15315661136 has 10 divisors (see below), whose sum is σ = 29674093482. Its totient is φ = 7657830560.

The previous prime is 15315661111. The next prime is 15315661159. The reversal of 15315661136 is 63116651351.

It can be written as a sum of positive squares in only one way, i.e., 8858574400 + 6457086736 = 94120^2 + 80356^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15315661136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478614395 + ... + 478614426.

Almost surely, 2^15315661136 is an apocalyptic number.

15315661136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15315661136 is a deficient number, since it is larger than the sum of its proper divisors (14358432346).

15315661136 is an equidigital number, since it uses as much as digits as its factorization.

15315661136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957228829 (or 957228823 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The spelling of 15315661136 in words is "fifteen billion, three hundred fifteen million, six hundred sixty-one thousand, one hundred thirty-six".