161527314172 has 96 divisors (see below), whose sum is σ = 362357452800. Its totient is φ = 61331033088.

The previous prime is 161527314167. The next prime is 161527314199. The reversal of 161527314172 is 271413725161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1363029 + ... + 1476787.

It is an arithmetic number, because the mean of its divisors is an integer number (3774556800).

Almost surely, 2^161527314172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161527314172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181178726400).

161527314172 is an abundant number, since it is smaller than the sum of its proper divisors (200830138628).

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

161527314172 is a wasteful number, since it uses less digits than its factorization.

161527314172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113963 (or 113961 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The spelling of 161527314172 in words is "one hundred sixty-one billion, five hundred twenty-seven million, three hundred fourteen thousand, one hundred seventy-two".