2566398812 has 24 divisors (see below), whose sum is σ = 4760894880. Its totient is φ = 1206318080.

The previous prime is 2566398803. The next prime is 2566398833. The reversal of 2566398812 is 2188936652.

It is a super-2 number, since 2×2566398812² = 13172805724470022688, which contains 22 as substring.

It is a congruent number.

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, 38489 + ... + 81327.

It is an arithmetic number, because the mean of its divisors is an integer number (198370620).

Almost surely, 2^2566398812 is an apocalyptic number.

It is an amenable number.

2566398812 is a deficient number, since it is larger than the sum of its proper divisors (2194496068).

2566398812 is a wasteful number, since it uses less digits than its factorization.

2566398812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43741 (or 43739 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 2566398812 is about 50659.6369114505. The cubic root of 2566398812 is about 1369.1195813788.

The spelling of 2566398812 in words is "two billion, five hundred sixty-six million, three hundred ninety-eight thousand, eight hundred twelve".