2564384386 has 4 divisors (see below), whose sum is σ = 3846576582. Its totient is φ = 1282192192.

The previous prime is 2564384357. The next prime is 2564384413. The reversal of 2564384386 is 6834834652.

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., 2552169361 + 12215025 = 50519^2 + 3495^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641096095 + ... + 641096098.

Almost surely, 2^2564384386 is an apocalyptic number.

2564384386 is a deficient number, since it is larger than the sum of its proper divisors (1282192196).

2564384386 is a wasteful number, since it uses less digits than its factorization.

2564384386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282192195.

The product of its digits is 3317760, while the sum is 49.

The square root of 2564384386 is about 50639.7510459915. The cubic root of 2564384386 is about 1368.7612697000.

The spelling of 2564384386 in words is "two billion, five hundred sixty-four million, three hundred eighty-four thousand, three hundred eighty-six".