138907502643 has 32 divisors (see below), whose sum is σ = 228049196032. Its totient is φ = 73238256000.

The previous prime is 138907502633. The next prime is 138907502659. The reversal of 138907502643 is 346205709831.

It is not a de Polignac number, because 138907502643 - 2¹⁴ = 138907486259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138907502592 and 138907502601.

It is not an unprimeable number, because it can be changed into a prime (138907502623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530418 + ... + 747768.

It is an arithmetic number, because the mean of its divisors is an integer number (7126537376).

It is a 1-persistent number, because it is pandigital, but 2⋅138907502643 = 277815005286 is not.

Almost surely, 2^138907502643 is an apocalyptic number.

138907502643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138907502643 is a deficient number, since it is larger than the sum of its proper divisors (89141693389).

138907502643 is a wasteful number, since it uses less digits than its factorization.

138907502643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219715.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 138907502643 in words is "one hundred thirty-eight billion, nine hundred seven million, five hundred two thousand, six hundred forty-three".