64572563 has 8 divisors (see below), whose sum is σ = 70541760. Its totient is φ = 58619880.

The previous prime is 64572551. The next prime is 64572593. The reversal of 64572563 is 36527546.

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

It is not a de Polignac number, because 64572563 - 2²⁰ = 63523987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64572593) 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, 4928 + ... + 12386.

It is an arithmetic number, because the mean of its divisors is an integer number (8817720).

Almost surely, 2^64572563 is an apocalyptic number.

64572563 is a deficient number, since it is larger than the sum of its proper divisors (5969197).

64572563 is a wasteful number, since it uses less digits than its factorization.

64572563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257.

The product of its digits is 151200, while the sum is 38.

The square root of 64572563 is about 8035.7055072968. The cubic root of 64572563 is about 401.1892999926.

The spelling of 64572563 in words is "sixty-four million, five hundred seventy-two thousand, five hundred sixty-three".