2531566656 has 56 divisors (see below), whose sum is σ = 7442342240. Its totient is φ = 843854976.

The previous prime is 2531566619. The next prime is 2531566657. The reversal of 2531566656 is 6566651352.

It is not an unprimeable number, because it can be changed into a prime (2531566657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730786 + ... + 734241.

Almost surely, 2^2531566656 is an apocalyptic number.

It is an amenable number.

2531566656 is an abundant number, since it is smaller than the sum of its proper divisors (4910775584).

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

2531566656 is a wasteful number, since it uses less digits than its factorization.

2531566656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465048 (or 1465032 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The square root of 2531566656 is about 50314.6763479603. The cubic root of 2531566656 is about 1362.8972720953.

The spelling of 2531566656 in words is "two billion, five hundred thirty-one million, five hundred sixty-six thousand, six hundred fifty-six".