165456554372650 has 24 divisors (see below), whose sum is σ = 309528088207884. Its totient is φ = 65800063238400.

The previous prime is 165456554372423. The next prime is 165456554372689. The reversal of 165456554372650 is 56273455654561.

It can be written as a sum of positive squares in 6 ways, for example, as 90849854447361 + 74606699925289 = 9531519^2 + 8637517^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9563954031 + ... + 9563971330.

Almost surely, 2^{165456554372650} is an apocalyptic number.

165456554372650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165456554372650 is a deficient number, since it is larger than the sum of its proper divisors (144071533835234).

165456554372650 is a wasteful number, since it uses less digits than its factorization.

165456554372650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19127925546 (or 19127925541 counting only the distinct ones).

The product of its (nonzero) digits is 453600000, while the sum is 64.

The spelling of 165456554372650 in words is "one hundred sixty-five trillion, four hundred fifty-six billion, five hundred fifty-four million, three hundred seventy-two thousand, six hundred fifty".