25604240652 has 18 divisors (see below), whose sum is σ = 64721830628. Its totient is φ = 8534746872.

The previous prime is 25604240603. The next prime is 25604240671.

25604240652 is a `hidden beast` number, since 2 + 5 + 604 + 2 + 40 + 6 + 5 + 2 = 666.

25604240652 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 711228907 = 25604240652 / (2 + 5 + 6 + 0 + 4 + 2 + 4 + 0 + 6 + 5 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355614418 + ... + 355614489.

Almost surely, 2^25604240652 is an apocalyptic number.

It is an amenable number.

25604240652 is an abundant number, since it is smaller than the sum of its proper divisors (39117589976).

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

25604240652 is a wasteful number, since it uses less digits than its factorization.

25604240652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711228917 (or 711228912 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

It can be divided in two parts, 25604 and 240652, that added together give a square (266256 = 516²).

The spelling of 25604240652 in words is "twenty-five billion, six hundred four million, two hundred forty thousand, six hundred fifty-two".