8157206631564 has 48 divisors (see below), whose sum is σ = 21274950144000. Its totient is φ = 2702787021648.

The previous prime is 8157206631557. The next prime is 8157206631617. The reversal of 8157206631564 is 4651366027518.

It is a happy number.

8157206631564 is a `hidden beast` number, since 8 + 1 + 5 + 72 + 0 + 6 + 6 + 3 + 1 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 8157206631564.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226118764 + ... + 226154835.

It is an arithmetic number, because the mean of its divisors is an integer number (443228128000).

Almost surely, 2^{8157206631564} is an apocalyptic number.

It is an amenable number.

8157206631564 is an abundant number, since it is smaller than the sum of its proper divisors (13117743512436).

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

8157206631564 is a wasteful number, since it uses less digits than its factorization.

8157206631564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452273779 (or 452273771 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 8157206631564 in words is "eight trillion, one hundred fifty-seven billion, two hundred six million, six hundred thirty-one thousand, five hundred sixty-four".