2564262466 has 4 divisors (see below), whose sum is σ = 3846393702. Its totient is φ = 1282131232.

The previous prime is 2564262443. The next prime is 2564262469. The reversal of 2564262466 is 6642624652.

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., 2301984441 + 262278025 = 47979^2 + 16195^2 .

It is not an unprimeable number, because it can be changed into a prime (2564262469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641065615 + ... + 641065618.

Almost surely, 2^2564262466 is an apocalyptic number.

2564262466 is a deficient number, since it is larger than the sum of its proper divisors (1282131236).

2564262466 is a wasteful number, since it uses less digits than its factorization.

2564262466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282131235.

The product of its digits is 829440, while the sum is 43.

The square root of 2564262466 is about 50638.5472342957. The cubic root of 2564262466 is about 1368.7395774218.

The spelling of 2564262466 in words is "two billion, five hundred sixty-four million, two hundred sixty-two thousand, four hundred sixty-six".