138807026553 has 256 divisors, whose sum is σ = 237027409920. Its totient is φ = 71341670400.

The previous prime is 138807026543. The next prime is 138807026581. The reversal of 138807026553 is 355620708831.

It is not a de Polignac number, because 138807026553 - 2⁹ = 138807026041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138807026503) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1955028508 + ... + 1955028578.

It is an arithmetic number, because the mean of its divisors is an integer number (925888320).

Almost surely, 2^138807026553 is an apocalyptic number.

138807026553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138807026553 is a deficient number, since it is larger than the sum of its proper divisors (98220383367).

138807026553 is a wasteful number, since it uses less digits than its factorization.

138807026553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 138807026553 in words is "one hundred thirty-eight billion, eight hundred seven million, twenty-six thousand, five hundred fifty-three".