64164531 has 4 divisors (see below), whose sum is σ = 85552712. Its totient is φ = 42776352.

The previous prime is 64164521. The next prime is 64164553. The reversal of 64164531 is 13546146.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64164531 - 2¹⁸ = 63902387 is a prime.

It is a super-2 number, since 2×64164531² = 8234174076899922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64164521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10694086 + ... + 10694091.

It is an arithmetic number, because the mean of its divisors is an integer number (21388178).

Almost surely, 2^64164531 is an apocalyptic number.

64164531 is a deficient number, since it is larger than the sum of its proper divisors (21388181).

64164531 is a wasteful number, since it uses less digits than its factorization.

64164531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21388180.

The product of its digits is 8640, while the sum is 30.

The square root of 64164531 is about 8010.2765869850. The cubic root of 64164531 is about 400.3424796023.

The spelling of 64164531 in words is "sixty-four million, one hundred sixty-four thousand, five hundred thirty-one".