12520366311564 has 144 divisors (see below), whose sum is σ = 32726202163200. Its totient is φ = 4031840540160.

The previous prime is 12520366311499. The next prime is 12520366311599. The reversal of 12520366311564 is 46511366302521.

It is a happy number.

12520366311564 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 0 + 3 + 6 + 631 + 1 + 5 + 6 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1987672087 + ... + 1987678385.

It is an arithmetic number, because the mean of its divisors is an integer number (227265292800).

Almost surely, 2^{12520366311564} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12520366311564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16363101081600).

12520366311564 is an abundant number, since it is smaller than the sum of its proper divisors (20205835851636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12520366311564 is a wasteful number, since it uses less digits than its factorization.

12520366311564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140 (or 9135 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 12520366311564 in words is "twelve trillion, five hundred twenty billion, three hundred sixty-six million, three hundred eleven thousand, five hundred sixty-four".