12639015152525 has 6 divisors (see below), whose sum is σ = 15672378789162. Its totient is φ = 10111212122000.

The previous prime is 12639015152513. The next prime is 12639015152527. The reversal of 12639015152525 is 52525151093621.

It can be written as a sum of positive squares in 3 ways, for example, as 3260213027236 + 9378802125289 = 1805606^2 + 3062483^2 .

It is not a de Polignac number, because 12639015152525 - 2⁶ = 12639015152461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12639015152525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639015152527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252780303026 + ... + 252780303075.

It is an arithmetic number, because the mean of its divisors is an integer number (2612063131527).

Almost surely, 2^{12639015152525} is an apocalyptic number.

It is an amenable number.

12639015152525 is a deficient number, since it is larger than the sum of its proper divisors (3033363636637).

12639015152525 is an equidigital number, since it uses as much as digits as its factorization.

12639015152525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505560606111 (or 505560606106 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 12639015152525 in words is "twelve trillion, six hundred thirty-nine billion, fifteen million, one hundred fifty-two thousand, five hundred twenty-five".