13151661507 has 12 divisors (see below), whose sum is σ = 19510273120. Its totient is φ = 8530807248.

The previous prime is 13151661493. The next prime is 13151661539. The reversal of 13151661507 is 70516615131.

13151661507 is a `hidden beast` number, since 1 + 31 + 5 + 1 + 6 + 615 + 0 + 7 = 666.

It is not a de Polignac number, because 13151661507 - 2⁷ = 13151661379 is a prime.

It is a super-2 number, since 2×13151661507² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13151661577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19746907 + ... + 19747572.

Almost surely, 2^13151661507 is an apocalyptic number.

13151661507 is a deficient number, since it is larger than the sum of its proper divisors (6358611613).

13151661507 is a wasteful number, since it uses less digits than its factorization.

13151661507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39494522 (or 39494519 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The spelling of 13151661507 in words is "thirteen billion, one hundred fifty-one million, six hundred sixty-one thousand, five hundred seven".