161703950880 has 384 divisors, whose sum is σ = 554429546496. Its totient is φ = 39496089600.

The previous prime is 161703950861. The next prime is 161703950897. The reversal of 161703950880 is 88059307161.

It is a super-2 number, since 2×161703950880² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33194845 + ... + 33199715.

It is an arithmetic number, because the mean of its divisors is an integer number (1443826944).

Almost surely, 2^161703950880 is an apocalyptic number.

161703950880 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 161703950880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277214773248).

161703950880 is an abundant number, since it is smaller than the sum of its proper divisors (392725595616).

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

161703950880 is a wasteful number, since it uses less digits than its factorization.

161703950880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040 (or 5032 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 161703950880 in words is "one hundred sixty-one billion, seven hundred three million, nine hundred fifty thousand, eight hundred eighty".