990952557156 has 81 divisors (see below), whose sum is σ = 2518737812409. Its totient is φ = 328503780000.

The previous prime is 990952557149. The next prime is 990952557191. The reversal of 990952557156 is 651755259099.

The square root of 990952557156 is 995466.

It is a perfect power (a square), and thus also a powerful number.

990952557156 is a `hidden beast` number, since 9 + 9 + 0 + 9 + 5 + 2 + 5 + 571 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 786829317156 + 204123240000 = 887034^2 + 451800^2 .

It is a junction number, because it is equal to n+sod(n) for n = 990952557093 and 990952557102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1499171466 + ... + 1499172126.

Almost surely, 2^990952557156 is an apocalyptic number.

990952557156 is the 995466-th square number.

It is an amenable number.

990952557156 is an abundant number, since it is smaller than the sum of its proper divisors (1527785255253).

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

990952557156 is an equidigital number, since it uses as much as digits as its factorization.

990952557156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 38272500, while the sum is 63.

The spelling of 990952557156 in words is "nine hundred ninety billion, nine hundred fifty-two million, five hundred fifty-seven thousand, one hundred fifty-six".