13138267666644 has 48 divisors (see below), whose sum is σ = 34103563482240. Its totient is φ = 4374101234880.

The previous prime is 13138267666637. The next prime is 13138267666649. The reversal of 13138267666644 is 44666676283131.

It is a super-2 number, since 2×13138267666644² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138267666649) 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, 73817937 + ... + 73995704.

It is an arithmetic number, because the mean of its divisors is an integer number (710490905880).

Almost surely, 2^{13138267666644} is an apocalyptic number.

It is an amenable number.

13138267666644 is an abundant number, since it is smaller than the sum of its proper divisors (20965295815596).

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

13138267666644 is a wasteful number, since it uses less digits than its factorization.

13138267666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147814477 (or 147814469 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 63.

The spelling of 13138267666644 in words is "thirteen trillion, one hundred thirty-eight billion, two hundred sixty-seven million, six hundred sixty-six thousand, six hundred forty-four".