12890986521604 has 9 divisors (see below), whose sum is σ = 22559238979221. Its totient is φ = 6445489670400.

The previous prime is 12890986521601. The next prime is 12890986521607. The reversal of 12890986521604 is 40612568909821.

The square root of 12890986521604 is 3590402.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (12890986521601) and next prime (12890986521607).

It can be written as a sum of positive squares in only one way, i.e., 5771054899204 + 7119931622400 = 2402302^2 + 2668320^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12890986521601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6283204 + ... + 8078404.

Almost surely, 2^{12890986521604} is an apocalyptic number.

12890986521604 is the 3590402-nd square number.

It is an amenable number.

12890986521604 is a deficient number, since it is larger than the sum of its proper divisors (9668252457617).

12890986521604 is an frugal number, since it uses more digits than its factorization.

12890986521604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590406 (or 1795203 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 12890986521604 in words is "twelve trillion, eight hundred ninety billion, nine hundred eighty-six million, five hundred twenty-one thousand, six hundred four".