2565257356 has 6 divisors (see below), whose sum is σ = 4489200380. Its totient is φ = 1282628676.

The previous prime is 2565257329. The next prime is 2565257363. The reversal of 2565257356 is 6537525652.

It is a super-2 number, since 2×2565257356² = 13161090605024221472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320657166 + ... + 320657173.

Almost surely, 2^2565257356 is an apocalyptic number.

It is an amenable number.

2565257356 is a deficient number, since it is larger than the sum of its proper divisors (1923943024).

2565257356 is a wasteful number, since it uses less digits than its factorization.

2565257356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641314343 (or 641314341 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 46.

The square root of 2565257356 is about 50648.3697269715. The cubic root of 2565257356 is about 1368.9165703860.

The spelling of 2565257356 in words is "two billion, five hundred sixty-five million, two hundred fifty-seven thousand, three hundred fifty-six".