13138267666531 has 16 divisors (see below), whose sum is σ = 15541942752000. Its totient is φ = 10866738280608.

The previous prime is 13138267666523. The next prime is 13138267666547. The reversal of 13138267666531 is 13566676283131.

It is not a de Polignac number, because 13138267666531 - 2³ = 13138267666523 is a prime.

It is a super-2 number, since 2×13138267666531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13138267666561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18431581 + ... + 19131118.

It is an arithmetic number, because the mean of its divisors is an integer number (971371422000).

Almost surely, 2^{13138267666531} is an apocalyptic number.

13138267666531 is a deficient number, since it is larger than the sum of its proper divisors (2403675085469).

13138267666531 is a wasteful number, since it uses less digits than its factorization.

13138267666531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37564458.

The product of its digits is 19595520, while the sum is 58.

The spelling of 13138267666531 in words is "thirteen trillion, one hundred thirty-eight billion, two hundred sixty-seven million, six hundred sixty-six thousand, five hundred thirty-one".