2564630626 has 4 divisors (see below), whose sum is σ = 3846945942. Its totient is φ = 1282315312.

The previous prime is 2564630611. The next prime is 2564630687. The reversal of 2564630626 is 6260364652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2408355625 + 156275001 = 49075^2 + 12501^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641157655 + ... + 641157658.

Almost surely, 2^2564630626 is an apocalyptic number.

2564630626 is a deficient number, since it is larger than the sum of its proper divisors (1282315316).

2564630626 is a wasteful number, since it uses less digits than its factorization.

2564630626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282315315.

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 2564630626 is about 50642.1822792028. The cubic root of 2564630626 is about 1368.8050791733.

The spelling of 2564630626 in words is "two billion, five hundred sixty-four million, six hundred thirty thousand, six hundred twenty-six".