25536524613 has 32 divisors (see below), whose sum is σ = 34795407360. Its totient is φ = 16655708160.

The previous prime is 25536524591. The next prime is 25536524621. The reversal of 25536524613 is 31642563552.

It is a happy number.

It is not a de Polignac number, because 25536524613 - 2¹⁶ = 25536459077 is a prime.

It is a super-2 number, since 2×25536524613² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536524623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12850806 + ... + 12852792.

It is an arithmetic number, because the mean of its divisors is an integer number (1087356480).

Almost surely, 2^25536524613 is an apocalyptic number.

It is an amenable number.

25536524613 is a deficient number, since it is larger than the sum of its proper divisors (9258882747).

25536524613 is a wasteful number, since it uses less digits than its factorization.

25536524613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its digits is 648000, while the sum is 42.

The spelling of 25536524613 in words is "twenty-five billion, five hundred thirty-six million, five hundred twenty-four thousand, six hundred thirteen".