16161123252 has 24 divisors (see below), whose sum is σ = 37871136576. Its totient is φ = 5363919808.

The previous prime is 16161123239. The next prime is 16161123281. The reversal of 16161123252 is 25232116161.

It is a super-2 number, since 2×16161123252² (a number of 21 digits) contains 22 as substring.

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, 2887248 + ... + 2892839.

It is an arithmetic number, because the mean of its divisors is an integer number (1577964024).

Almost surely, 2^16161123252 is an apocalyptic number.

16161123252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16161123252 is an abundant number, since it is smaller than the sum of its proper divisors (21710013324).

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

16161123252 is a wasteful number, since it uses less digits than its factorization.

16161123252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780327 (or 5780325 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The spelling of 16161123252 in words is "sixteen billion, one hundred sixty-one million, one hundred twenty-three thousand, two hundred fifty-two".