25506356255613 has 64 divisors (see below), whose sum is σ = 42144410419200. Its totient is φ = 15151358396160.

The previous prime is 25506356255591. The next prime is 25506356255621. The reversal of 25506356255613 is 31655265360552.

25506356255613 is a `hidden beast` number, since 2 + 5 + 5 + 0 + 6 + 3 + 5 + 625 + 5 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 25506356255613 - 2¹⁷ = 25506356124541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25506356255613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506356255663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11834470 + ... + 13822712.

It is an arithmetic number, because the mean of its divisors is an integer number (658506412800).

Almost surely, 2^{25506356255613} is an apocalyptic number.

It is an amenable number.

25506356255613 is a deficient number, since it is larger than the sum of its proper divisors (16638054163587).

25506356255613 is a wasteful number, since it uses less digits than its factorization.

25506356255613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989759 (or 1989753 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 54.

The spelling of 25506356255613 in words is "twenty-five trillion, five hundred six billion, three hundred fifty-six million, two hundred fifty-five thousand, six hundred thirteen".