161651112032 has 48 divisors (see below), whose sum is σ = 322494984000. Its totient is φ = 79748997120.

The previous prime is 161651112019. The next prime is 161651112047. The reversal of 161651112032 is 230211156161.

It is a super-2 number, since 2×161651112032² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161651111986 and 161651112004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3895232 + ... + 3936512.

It is an arithmetic number, because the mean of its divisors is an integer number (6718645500).

Almost surely, 2^161651112032 is an apocalyptic number.

It is an amenable number.

161651112032 is a deficient number, since it is larger than the sum of its proper divisors (160843871968).

161651112032 is a wasteful number, since it uses less digits than its factorization.

161651112032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42919 (or 42911 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 161651112032 its reverse (230211156161), we get a palindrome (391862268193).

The spelling of 161651112032 in words is "one hundred sixty-one billion, six hundred fifty-one million, one hundred twelve thousand, thirty-two".