25552615564 has 12 divisors (see below), whose sum is σ = 51105231184. Its totient is φ = 10951120944.

The previous prime is 25552615559. The next prime is 25552615567. The reversal of 25552615564 is 46551625552.

25552615564 is an admirable number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25552615567) 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 3 ways as a sum of consecutive naturals, for example, 456296679 + ... + 456296734.

Almost surely, 2^25552615564 is an apocalyptic number.

It is an amenable number.

25552615564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25552615564 is a wasteful number, since it uses less digits than its factorization.

25552615564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912593424 (or 912593422 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 46.

The spelling of 25552615564 in words is "twenty-five billion, five hundred fifty-two million, six hundred fifteen thousand, five hundred sixty-four".