6394582564 has 6 divisors (see below), whose sum is σ = 11190519494. Its totient is φ = 3197291280.

The previous prime is 6394582561. The next prime is 6394582573. The reversal of 6394582564 is 4652854936.

It can be written as a sum of positive squares in only one way, i.e., 6310713600 + 83868964 = 79440^2 + 9158^2 .

It is not an unprimeable number, because it can be changed into a prime (6394582561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799322817 + ... + 799322824.

Almost surely, 2^6394582564 is an apocalyptic number.

It is an amenable number.

6394582564 is a deficient number, since it is larger than the sum of its proper divisors (4795936930).

6394582564 is a wasteful number, since it uses less digits than its factorization.

6394582564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598645645 (or 1598645643 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 52.

The square root of 6394582564 is about 79966.1338567771. The cubic root of 6394582564 is about 1856.1115207619. Note that the first 3 decimals are identical.

The spelling of 6394582564 in words is "six billion, three hundred ninety-four million, five hundred eighty-two thousand, five hundred sixty-four".