25136532056556 has 72 divisors (see below), whose sum is σ = 63778713643008. Its totient is φ = 8347312764000.

The previous prime is 25136532056551. The next prime is 25136532056609. The reversal of 25136532056556 is 65565023563152.

25136532056556 is a `hidden beast` number, since 2 + 5 + 1 + 3 + 6 + 5 + 3 + 20 + 565 + 56 = 666.

It is a super-2 number, since 2×25136532056556² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25136532056551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144018661 + ... + 144193091.

It is an arithmetic number, because the mean of its divisors is an integer number (885815467264).

Almost surely, 2^{25136532056556} is an apocalyptic number.

It is an amenable number.

25136532056556 is an abundant number, since it is smaller than the sum of its proper divisors (38642181586452).

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

25136532056556 is a wasteful number, since it uses less digits than its factorization.

25136532056556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189483 (or 189478 counting only the distinct ones).

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

The spelling of 25136532056556 in words is "twenty-five trillion, one hundred thirty-six billion, five hundred thirty-two million, fifty-six thousand, five hundred fifty-six".