25520605263 has 12 divisors (see below), whose sum is σ = 36972486928. Its totient is φ = 16963248960.

The previous prime is 25520605223. The next prime is 25520605277. The reversal of 25520605263 is 36250602552.

25520605263 is a `hidden beast` number, since 2 + 5 + 5 + 20 + 605 + 26 + 3 = 666.

It is not a de Polignac number, because 25520605263 - 2¹⁸ = 25520343119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520605223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4204123 + ... + 4210188.

Almost surely, 2^25520605263 is an apocalyptic number.

25520605263 is a deficient number, since it is larger than the sum of its proper divisors (11451881665).

25520605263 is a wasteful number, since it uses less digits than its factorization.

25520605263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8414654 (or 8414651 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 25520605263 in words is "twenty-five billion, five hundred twenty million, six hundred five thousand, two hundred sixty-three".