64572685 has 4 divisors (see below), whose sum is σ = 77487228. Its totient is φ = 51658144.

The previous prime is 64572679. The next prime is 64572691. The reversal of 64572685 is 58627546.

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

It is an interprime number because it is at equal distance from previous prime (64572679) and next prime (64572691).

It can be written as a sum of positive squares in 2 ways, for example, as 19333609 + 45239076 = 4397^2 + 6726^2 .

It is a cyclic number.

It is not a de Polignac number, because 64572685 - 2⁹ = 64572173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6457264 + ... + 6457273.

It is an arithmetic number, because the mean of its divisors is an integer number (19371807).

Almost surely, 2^64572685 is an apocalyptic number.

It is an amenable number.

64572685 is a deficient number, since it is larger than the sum of its proper divisors (12914543).

64572685 is a wasteful number, since it uses less digits than its factorization.

64572685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12914542.

The product of its digits is 403200, while the sum is 43.

The square root of 64572685 is about 8035.7130984126. The cubic root of 64572685 is about 401.1895526544.

The spelling of 64572685 in words is "sixty-four million, five hundred seventy-two thousand, six hundred eighty-five".