64745916 has 12 divisors (see below), whose sum is σ = 151073832. Its totient is φ = 21581968.

The previous prime is 64745909. The next prime is 64745921. The reversal of 64745916 is 61954746.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2697735 + ... + 2697758.

It is an arithmetic number, because the mean of its divisors is an integer number (12589486).

Almost surely, 2^64745916 is an apocalyptic number.

It is an amenable number.

64745916 is an abundant number, since it is smaller than the sum of its proper divisors (86327916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64745916 is a wasteful number, since it uses less digits than its factorization.

64745916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395500 (or 5395498 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 64745916 is about 8046.4846983015. The cubic root of 64745916 is about 401.5479932311.

The spelling of 64745916 in words is "sixty-four million, seven hundred forty-five thousand, nine hundred sixteen".