15138902639015 has 4 divisors (see below), whose sum is σ = 18166683166824. Its totient is φ = 12111122111208.

The previous prime is 15138902639009. The next prime is 15138902639017. The reversal of 15138902639015 is 51093620983151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15138902639015 - 2¹⁶ = 15138902573479 is a prime.

It is a super-2 number, since 2×15138902639015² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15138902639017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513890263897 + ... + 1513890263906.

It is an arithmetic number, because the mean of its divisors is an integer number (4541670791706).

Almost surely, 2^{15138902639015} is an apocalyptic number.

15138902639015 is a deficient number, since it is larger than the sum of its proper divisors (3027780527809).

15138902639015 is an equidigital number, since it uses as much as digits as its factorization.

15138902639015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027780527808.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 15138902639015 in words is "fifteen trillion, one hundred thirty-eight billion, nine hundred two million, six hundred thirty-nine thousand, fifteen".