10000631556 has 36 divisors (see below), whose sum is σ = 26151079500. Its totient is φ = 3218593728.

The previous prime is 10000631539. The next prime is 10000631573. The reversal of 10000631556 is 65513600001.

It is a happy number.

10000631556 is a `hidden beast` number, since 100 + 0 + 0 + 6 + 3 + 1 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (10000631539) and next prime (10000631573).

It can be written as a sum of positive squares in 2 ways, for example, as 1573391556 + 8427240000 = 39666^2 + 91800^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×10000631556² (a number of 21 digits) contains 22 as substring.

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, 4788531 + ... + 4790618.

It is an arithmetic number, because the mean of its divisors is an integer number (726418875).

Almost surely, 2^10000631556 is an apocalyptic number.

It is an amenable number.

10000631556 is an abundant number, since it is smaller than the sum of its proper divisors (16150447944).

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

10000631556 is a wasteful number, since it uses less digits than its factorization.

10000631556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579188 (or 9579183 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The spelling of 10000631556 in words is "ten billion, six hundred thirty-one thousand, five hundred fifty-six".