138929915630 has 16 divisors (see below), whose sum is σ = 272807834544. Its totient is φ = 50519969280.

The previous prime is 138929915623. The next prime is 138929915651. The reversal of 138929915630 is 36519929831.

It is a happy number.

138929915630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631499507 + ... + 631499726.

It is an arithmetic number, because the mean of its divisors is an integer number (17050489659).

Almost surely, 2^138929915630 is an apocalyptic number.

138929915630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138929915630 is a deficient number, since it is larger than the sum of its proper divisors (133877918914).

138929915630 is a wasteful number, since it uses less digits than its factorization.

138929915630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262999251.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 138929915630 in words is "one hundred thirty-eight billion, nine hundred twenty-nine million, nine hundred fifteen thousand, six hundred thirty".