138537610651 has 12 divisors (see below), whose sum is σ = 152288679312. Its totient is φ = 125933522000.

The previous prime is 138537610649. The next prime is 138537610661. The reversal of 138537610651 is 156016735831.

It is not a de Polignac number, because 138537610651 - 2¹ = 138537610649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138537610661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1859661 + ... + 1932721.

It is an arithmetic number, because the mean of its divisors is an integer number (12690723276).

Almost surely, 2^138537610651 is an apocalyptic number.

138537610651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138537610651 is a deficient number, since it is larger than the sum of its proper divisors (13751068661).

138537610651 is a wasteful number, since it uses less digits than its factorization.

138537610651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88754 (or 88743 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 138537610651 in words is "one hundred thirty-eight billion, five hundred thirty-seven million, six hundred ten thousand, six hundred fifty-one".