161151737600 has 432 divisors, whose sum is σ = 485844737280. Its totient is φ = 51690700800.

The previous prime is 161151737599. The next prime is 161151737603. The reversal of 161151737600 is 6737151161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161151737603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70648460 + ... + 70650740.

Almost surely, 2^161151737600 is an apocalyptic number.

161151737600 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 161151737600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242922368640).

161151737600 is an abundant number, since it is smaller than the sum of its proper divisors (324692999680).

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

161151737600 is a wasteful number, since it uses less digits than its factorization.

161151737600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 38.

Adding to 161151737600 its reverse (6737151161), we get a palindrome (167888888761).

The spelling of 161151737600 in words is "one hundred sixty-one billion, one hundred fifty-one million, seven hundred thirty-seven thousand, six hundred".