138885507660 has 48 divisors (see below), whose sum is σ = 388911440736. Its totient is φ = 37033085952.

The previous prime is 138885507643. The next prime is 138885507701. The reversal of 138885507660 is 66705588831.

It is a self number, because there is not a number n which added to its sum of digits gives 138885507660.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693444 + ... + 870996.

It is an arithmetic number, because the mean of its divisors is an integer number (8102321682).

Almost surely, 2^138885507660 is an apocalyptic number.

138885507660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138885507660 is an abundant number, since it is smaller than the sum of its proper divisors (250025933076).

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

138885507660 is a wasteful number, since it uses less digits than its factorization.

138885507660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190602 (or 190600 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 138885507660 in words is "one hundred thirty-eight billion, eight hundred eighty-five million, five hundred seven thousand, six hundred sixty".