25613231652 has 18 divisors (see below), whose sum is σ = 64744557878. Its totient is φ = 8537743872.

The previous prime is 25613231563. The next prime is 25613231663.

25613231652 is a `hidden beast` number, since 2 + 5 + 613 + 2 + 31 + 6 + 5 + 2 = 666.

25613231652 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 21956126976 + 3657104676 = 148176^2 + 60474^2 .

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: 711478657 = 25613231652 / (2 + 5 + 6 + 1 + 3 + 2 + 3 + 1 + 6 + 5 + 2).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 355739293 + ... + 355739364.

Almost surely, 2^25613231652 is an apocalyptic number.

It is an amenable number.

25613231652 is an abundant number, since it is smaller than the sum of its proper divisors (39131326226).

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

25613231652 is a wasteful number, since it uses less digits than its factorization.

25613231652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711478667 (or 711478662 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The spelling of 25613231652 in words is "twenty-five billion, six hundred thirteen million, two hundred thirty-one thousand, six hundred fifty-two".