25664575680564 has 24 divisors (see below), whose sum is σ = 59937621420768. Its totient is φ = 8547199774560.

The previous prime is 25664575680547. The next prime is 25664575680593. The reversal of 25664575680564 is 46508657546652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957334242 + ... + 957361049.

It is an arithmetic number, because the mean of its divisors is an integer number (2497400892532).

Almost surely, 2^{25664575680564} is an apocalyptic number.

It is an amenable number.

25664575680564 is an abundant number, since it is smaller than the sum of its proper divisors (34273045740204).

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

25664575680564 is a wasteful number, since it uses less digits than its factorization.

25664575680564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914696415 (or 1914696413 counting only the distinct ones).

The product of its (nonzero) digits is 1451520000, while the sum is 69.

The spelling of 25664575680564 in words is "twenty-five trillion, six hundred sixty-four billion, five hundred seventy-five million, six hundred eighty thousand, five hundred sixty-four".