64765896 has 128 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 18892800.

The previous prime is 64765891. The next prime is 64765919. The reversal of 64765896 is 69856746.

It is not an unprimeable number, because it can be changed into a prime (64765891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780271 + ... + 780353.

It is an arithmetic number, because the mean of its divisors is an integer number (1435455).

Almost surely, 2^64765896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64765896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91869120).

64765896 is an abundant number, since it is smaller than the sum of its proper divisors (118972344).

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

64765896 is a wasteful number, since it uses less digits than its factorization.

64765896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 203 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 64765896 is about 8047.7261384816. The cubic root of 64765896 is about 401.5892936676.

The spelling of 64765896 in words is "sixty-four million, seven hundred sixty-five thousand, eight hundred ninety-six".