64571992 has 24 divisors (see below), whose sum is σ = 122568300. Its totient is φ = 31891904.

The previous prime is 64571911. The next prime is 64572029. The reversal of 64571992 is 29917546.

It is a happy number.

64571992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62859 + ... + 63877.

Almost surely, 2^64571992 is an apocalyptic number.

It is an amenable number.

64571992 is a deficient number, since it is larger than the sum of its proper divisors (57996308).

64571992 is a wasteful number, since it uses less digits than its factorization.

64571992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1110 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 64571992 is about 8035.6699782905. The cubic root of 64571992 is about 401.1881174482.

The spelling of 64571992 in words is "sixty-four million, five hundred seventy-one thousand, nine hundred ninety-two".