161656207654700 has 36 divisors (see below), whose sum is σ = 382684331577912. Its totient is φ = 58784075510400.

The previous prime is 161656207654661. The next prime is 161656207654703. The reversal of 161656207654700 is 7456702656161.

It is a super-2 number, since 2×161656207654700² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161656207654703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73480093289 + ... + 73480095488.

Almost surely, 2^{161656207654700} is an apocalyptic number.

161656207654700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161656207654700 is an abundant number, since it is smaller than the sum of its proper divisors (221028123923212).

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

161656207654700 is a wasteful number, since it uses less digits than its factorization.

161656207654700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146960188802 (or 146960188795 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 161656207654700 in words is "one hundred sixty-one trillion, six hundred fifty-six billion, two hundred seven million, six hundred fifty-four thousand, seven hundred".