165715992100 has 36 divisors (see below), whose sum is σ = 359850492400. Its totient is φ = 66240905760.

The previous prime is 165715992077. The next prime is 165715992103. The reversal of 165715992100 is 1299517561.

It is not an unprimeable number, because it can be changed into a prime (165715992103) 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, 422010 + ... + 713809.

Almost surely, 2^165715992100 is an apocalyptic number.

165715992100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165715992100 is an abundant number, since it is smaller than the sum of its proper divisors (194134500300).

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

165715992100 is a wasteful number, since it uses less digits than its factorization.

165715992100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137292 (or 1137285 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 46.

The spelling of 165715992100 in words is "one hundred sixty-five billion, seven hundred fifteen million, nine hundred ninety-two thousand, one hundred".