64328553 has 8 divisors (see below), whose sum is σ = 95301600. Its totient is φ = 42885684.

The previous prime is 64328543. The next prime is 64328573. The reversal of 64328553 is 35582346.

It is a happy number.

64328553 is a `hidden beast` number, since 643 + 2 + 8 + 5 + 5 + 3 = 666.

It is not a de Polignac number, because 64328553 - 2⁶ = 64328489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64328513) 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, 1191243 + ... + 1191296.

It is an arithmetic number, because the mean of its divisors is an integer number (11912700).

Almost surely, 2^64328553 is an apocalyptic number.

It is an amenable number.

64328553 is a deficient number, since it is larger than the sum of its proper divisors (30973047).

64328553 is a wasteful number, since it uses less digits than its factorization.

64328553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382548 (or 2382542 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 64328553 is about 8020.5082756643. The cubic root of 64328553 is about 400.6833174451.

The spelling of 64328553 in words is "sixty-four million, three hundred twenty-eight thousand, five hundred fifty-three".