15662864131 has 2 divisors, whose sum is σ = 15662864132. Its totient is φ = 15662864130.

The previous prime is 15662864123. The next prime is 15662864177. The reversal of 15662864131 is 13146826651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15662864131 - 2³ = 15662864123 is a prime.

It is a super-2 number, since 2×15662864131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15662864101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7831432065 + 7831432066.

It is an arithmetic number, because the mean of its divisors is an integer number (7831432066).

Almost surely, 2^15662864131 is an apocalyptic number.

15662864131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15662864131 is an equidigital number, since it uses as much as digits as its factorization.

15662864131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The spelling of 15662864131 in words is "fifteen billion, six hundred sixty-two million, eight hundred sixty-four thousand, one hundred thirty-one".