12910531668138 has 48 divisors (see below), whose sum is σ = 30124860661896. Its totient is φ = 3972433466880.

The previous prime is 12910531668137. The next prime is 12910531668211. The reversal of 12910531668138 is 83186613501921.

12910531668138 is a `hidden beast` number, since 1 + 2 + 9 + 10 + 531 + 6 + 68 + 1 + 38 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10698610182129 + 2211921486009 = 3270873^2 + 1487253^2 .

It is not an unprimeable number, because it can be changed into a prime (12910531668137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33781398 + ... + 34161438.

Almost surely, 2^{12910531668138} is an apocalyptic number.

12910531668138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12910531668138 is an abundant number, since it is smaller than the sum of its proper divisors (17214328993758).

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

12910531668138 is a wasteful number, since it uses less digits than its factorization.

12910531668138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525239 (or 525236 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 12910531668138 in words is "twelve trillion, nine hundred ten billion, five hundred thirty-one million, six hundred sixty-eight thousand, one hundred thirty-eight".