64579491 has 32 divisors (see below), whose sum is σ = 100531200. Its totient is φ = 40914720.

The previous prime is 64579483. The next prime is 64579511. The reversal of 64579491 is 19497546.

It is not a de Polignac number, because 64579491 - 2³ = 64579483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64579451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51846 + ... + 53076.

It is an arithmetic number, because the mean of its divisors is an integer number (3141600).

Almost surely, 2^64579491 is an apocalyptic number.

64579491 is a deficient number, since it is larger than the sum of its proper divisors (35951709).

64579491 is a wasteful number, since it uses less digits than its factorization.

64579491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1330 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 64579491 is about 8036.1365717613. The cubic root of 64579491 is about 401.2036473663.

The spelling of 64579491 in words is "sixty-four million, five hundred seventy-nine thousand, four hundred ninety-one".