64568553 has 16 divisors (see below), whose sum is σ = 100485120. Its totient is φ = 36110736.

The previous prime is 64568531. The next prime is 64568557. The reversal of 64568553 is 35586546.

It is a happy number.

It is not a de Polignac number, because 64568553 - 2⁶ = 64568489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64568557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31723 + ... + 33696.

It is an arithmetic number, because the mean of its divisors is an integer number (6280320).

Almost surely, 2^64568553 is an apocalyptic number.

It is an amenable number.

64568553 is a deficient number, since it is larger than the sum of its proper divisors (35916567).

64568553 is a wasteful number, since it uses less digits than its factorization.

64568553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65476.

The product of its digits is 432000, while the sum is 42.

The square root of 64568553 is about 8035.4559920393. The cubic root of 64568553 is about 401.1809951114.

The spelling of 64568553 in words is "sixty-four million, five hundred sixty-eight thousand, five hundred fifty-three".