25613568 has 54 divisors (see below), whose sum is σ = 73856874. Its totient is φ = 8537088.

The previous prime is 25613531. The next prime is 25613569. The reversal of 25613568 is 86531652.

25613568 is a `hidden beast` number, since 2 + 561 + 35 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17040384 + 8573184 = 4128^2 + 2928^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3255 + ... + 7862.

Almost surely, 2^25613568 is an apocalyptic number.

It is an amenable number.

25613568 is an abundant number, since it is smaller than the sum of its proper divisors (48243306).

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

25613568 is a wasteful number, since it uses less digits than its factorization.

25613568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139 (or 11122 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 25613568 is about 5060.9848843876. The cubic root of 25613568 is about 294.7745783405.

It can be divided in two parts, 256 and 13568, that added together give a cube (13824 = 24³).

The spelling of 25613568 in words is "twenty-five million, six hundred thirteen thousand, five hundred sixty-eight".