138152720651 has 16 divisors (see below), whose sum is σ = 157099219200. Its totient is φ = 120336871200.

The previous prime is 138152720611. The next prime is 138152720653. The reversal of 138152720651 is 156027251831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138152720651 - 2¹⁴ = 138152704267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138152720599 and 138152720608.

It is not an unprimeable number, because it can be changed into a prime (138152720653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611191 + ... + 1694768.

It is an arithmetic number, because the mean of its divisors is an integer number (9818701200).

Almost surely, 2^138152720651 is an apocalyptic number.

138152720651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138152720651 is a deficient number, since it is larger than the sum of its proper divisors (18946498549).

138152720651 is a wasteful number, since it uses less digits than its factorization.

138152720651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306130.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 138152720651 in words is "one hundred thirty-eight billion, one hundred fifty-two million, seven hundred twenty thousand, six hundred fifty-one".