138959938560 has 88 divisors (see below), whose sum is σ = 444454727616. Its totient is φ = 37055979520.

The previous prime is 138959938531. The next prime is 138959938613. The reversal of 138959938560 is 65839959831.

It is a junction number, because it is equal to n+sod(n) for n = 138959938491 and 138959938500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4508076 + ... + 4538795.

Almost surely, 2^138959938560 is an apocalyptic number.

138959938560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138959938560 is an abundant number, since it is smaller than the sum of its proper divisors (305494789056).

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

138959938560 is an equidigital number, since it uses as much as digits as its factorization.

138959938560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046899 (or 9046881 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 66.

The spelling of 138959938560 in words is "one hundred thirty-eight billion, nine hundred fifty-nine million, nine hundred thirty-eight thousand, five hundred sixty".