25053649656 has 64 divisors (see below), whose sum is σ = 72319860480. Its totient is φ = 7084385280.

The previous prime is 25053649639. The next prime is 25053649661. The reversal of 25053649656 is 65694635052.

It is a happy number.

It is a super-2 number, since 2×25053649656² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25053649599 and 25053649608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752410 + ... + 785001.

It is an arithmetic number, because the mean of its divisors is an integer number (1129997820).

Almost surely, 2^25053649656 is an apocalyptic number.

It is an amenable number.

25053649656 is an abundant number, since it is smaller than the sum of its proper divisors (47266210824).

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

25053649656 is a wasteful number, since it uses less digits than its factorization.

25053649656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537524 (or 1537520 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 25053649656 in words is "twenty-five billion, fifty-three million, six hundred forty-nine thousand, six hundred fifty-six".