165505016500656 has 40 divisors (see below), whose sum is σ = 488633858241024. Its totient is φ = 47287147571520.

The previous prime is 165505016500631. The next prime is 165505016500667. The reversal of 165505016500656 is 656005610505561.

It is a junction number, because it is equal to n+sod(n) for n = 165505016500599 and 165505016500608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246287226600 + ... + 246287227271.

Almost surely, 2^{165505016500656} is an apocalyptic number.

165505016500656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165505016500656 is an abundant number, since it is smaller than the sum of its proper divisors (323128841740368).

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

165505016500656 is a wasteful number, since it uses less digits than its factorization.

165505016500656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492574453889 (or 492574453883 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 165505016500656 in words is "one hundred sixty-five trillion, five hundred five billion, sixteen million, five hundred thousand, six hundred fifty-six".