161037322110720 has 576 divisors, whose sum is σ = 625206715015680. Its totient is φ = 38926813593600.

The previous prime is 161037322110713. The next prime is 161037322110737. The reversal of 161037322110720 is 27011223730161.

161037322110720 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 373 + 2 + 211 + 0 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×161037322110720² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131305140 + ... + 132525900.

It is an arithmetic number, because the mean of its divisors is an integer number (1085428324680).

Almost surely, 2^{161037322110720} is an apocalyptic number.

161037322110720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161037322110720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312603357507840).

161037322110720 is an abundant number, since it is smaller than the sum of its proper divisors (464169392904960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161037322110720 is a wasteful number, since it uses less digits than its factorization.

161037322110720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221149 (or 1221129 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

Adding to 161037322110720 its reverse (27011223730161), we get a palindrome (188048545840881).

The spelling of 161037322110720 in words is "one hundred sixty-one trillion, thirty-seven billion, three hundred twenty-two million, one hundred ten thousand, seven hundred twenty".