2571520656 has 40 divisors (see below), whose sum is σ = 6805126944. Its totient is φ = 836266240.

The previous prime is 2571520597. The next prime is 2571520661. The reversal of 2571520656 is 6560251752.

It is a super-2 number, since 2×2571520656² = 13225436968469340672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651366 + ... + 655301.

Almost surely, 2^2571520656 is an apocalyptic number.

It is an amenable number.

2571520656 is an abundant number, since it is smaller than the sum of its proper divisors (4233606288).

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

2571520656 is a wasteful number, since it uses less digits than its factorization.

2571520656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306719 (or 1306713 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 2571520656 is about 50710.1632417014. The cubic root of 2571520656 is about 1370.0297746917.

The spelling of 2571520656 in words is "two billion, five hundred seventy-one million, five hundred twenty thousand, six hundred fifty-six".