64675531 has 8 divisors (see below), whose sum is σ = 68878944. Its totient is φ = 60516480.

The previous prime is 64675511. The next prime is 64675537. The reversal of 64675531 is 13557646.

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 64675531 - 2⁹ = 64675019 is a prime.

It is a super-2 number, since 2×64675531² = 8365848620263922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64675537) 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, 8055 + ... + 13936.

It is an arithmetic number, because the mean of its divisors is an integer number (8609868).

Almost surely, 2^64675531 is an apocalyptic number.

64675531 is a deficient number, since it is larger than the sum of its proper divisors (4203413).

64675531 is a wasteful number, since it uses less digits than its factorization.

64675531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22181.

The product of its digits is 75600, while the sum is 37.

The square root of 64675531 is about 8042.1098599808. The cubic root of 64675531 is about 401.4024334545.

The spelling of 64675531 in words is "sixty-four million, six hundred seventy-five thousand, five hundred thirty-one".