64490579 has 8 divisors (see below), whose sum is σ = 68376000. Its totient is φ = 60654312.

The previous prime is 64490563. The next prime is 64490641. The reversal of 64490579 is 97509446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64490579 - 2⁴ = 64490563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64490549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9569 + ... + 14850.

It is an arithmetic number, because the mean of its divisors is an integer number (8547000).

Almost surely, 2^64490579 is an apocalyptic number.

64490579 is a deficient number, since it is larger than the sum of its proper divisors (3885421).

64490579 is a wasteful number, since it uses less digits than its factorization.

64490579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24577.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 64490579 is about 8030.6026548448. The cubic root of 64490579 is about 401.0194392352.

The spelling of 64490579 in words is "sixty-four million, four hundred ninety thousand, five hundred seventy-nine".