138536852620 has 24 divisors (see below), whose sum is σ = 298790294544. Its totient is φ = 53917045056.

The previous prime is 138536852609. The next prime is 138536852677. The reversal of 138536852620 is 26258635831.

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, 93605242 + ... + 93606721.

It is an arithmetic number, because the mean of its divisors is an integer number (12449595606).

Almost surely, 2^138536852620 is an apocalyptic number.

138536852620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138536852620 is an abundant number, since it is smaller than the sum of its proper divisors (160253441924).

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

138536852620 is a wasteful number, since it uses less digits than its factorization.

138536852620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187212009 (or 187212007 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 138536852620 in words is "one hundred thirty-eight billion, five hundred thirty-six million, eight hundred fifty-two thousand, six hundred twenty".