138877765264 has 40 divisors (see below), whose sum is σ = 307591562880. Its totient is φ = 59504233728.

The previous prime is 138877765259. The next prime is 138877765291. The reversal of 138877765264 is 462567778831.

It is a junction number, because it is equal to n+sod(n) for n = 138877765196 and 138877765205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303957 + ... + 608395.

It is an arithmetic number, because the mean of its divisors is an integer number (7689789072).

Almost surely, 2^138877765264 is an apocalyptic number.

138877765264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138877765264 is an abundant number, since it is smaller than the sum of its proper divisors (168713797616).

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

138877765264 is a wasteful number, since it uses less digits than its factorization.

138877765264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308527 (or 308521 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 64.

The spelling of 138877765264 in words is "one hundred thirty-eight billion, eight hundred seventy-seven million, seven hundred sixty-five thousand, two hundred sixty-four".