2566356404 has 6 divisors (see below), whose sum is σ = 4491123714. Its totient is φ = 1283178200.

The previous prime is 2566356379. The next prime is 2566356413. The reversal of 2566356404 is 4046536652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2313610000 + 252746404 = 48100^2 + 15898^2 .

It is a super-2 number, since 2×2566356404² = 13172370384703622432, 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 as a sum of consecutive naturals, namely, 320794547 + ... + 320794554.

It is an arithmetic number, because the mean of its divisors is an integer number (748520619).

Almost surely, 2^2566356404 is an apocalyptic number.

It is an amenable number.

2566356404 is a deficient number, since it is larger than the sum of its proper divisors (1924767310).

2566356404 is a wasteful number, since it uses less digits than its factorization.

2566356404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641589105 (or 641589103 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 2566356404 is about 50659.2183516485. The cubic root of 2566356404 is about 1369.1120400797.

The spelling of 2566356404 in words is "two billion, five hundred sixty-six million, three hundred fifty-six thousand, four hundred four".