64596816 has 60 divisors (see below), whose sum is σ = 181896468. Its totient is φ = 21399552.

The previous prime is 64596803. The next prime is 64596817. The reversal of 64596816 is 61869546.

It can be written as a sum of positive squares in 2 ways, for example, as 50126400 + 14470416 = 7080^2 + 3804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64596817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23616 + ... + 26208.

Almost surely, 2^64596816 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 64596816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90948234).

64596816 is an abundant number, since it is smaller than the sum of its proper divisors (117299652).

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

64596816 is a wasteful number, since it uses less digits than its factorization.

64596816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780 (or 2771 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 64596816 is about 8037.2144428278. The cubic root of 64596816 is about 401.2395216642.

It can be divided in two parts, 645 and 96816, that added together give a triangular number (97461 = T₄₄₁).

The spelling of 64596816 in words is "sixty-four million, five hundred ninety-six thousand, eight hundred sixteen".