161615603232 has 144 divisors (see below), whose sum is σ = 472804480512. Its totient is φ = 52340198400.

The previous prime is 161615603203. The next prime is 161615603263. The reversal of 161615603232 is 232306516161.

161615603232 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 15 + 603 + 2 + 32 = 666.

161615603232 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×161615603232² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1810857 + ... + 1898007.

It is an arithmetic number, because the mean of its divisors is an integer number (3283364448).

Almost surely, 2^161615603232 is an apocalyptic number.

161615603232 is a gapful number since it is divisible by the number (12) 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 161615603232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236402240256).

161615603232 is an abundant number, since it is smaller than the sum of its proper divisors (311188877280).

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

161615603232 is a wasteful number, since it uses less digits than its factorization.

161615603232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87351 (or 87340 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 161615603232 in words is "one hundred sixty-one billion, six hundred fifteen million, six hundred three thousand, two hundred thirty-two".