64000715860 has 72 divisors (see below), whose sum is σ = 140909819400. Its totient is φ = 24415657728.

The previous prime is 64000715833. The next prime is 64000715861. The reversal of 64000715860 is 6851700046.

It can be written as a sum of positive squares in 4 ways, for example, as 1702552644 + 62298163216 = 41262^2 + 249596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64000715861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3683754 + ... + 3701086.

It is an arithmetic number, because the mean of its divisors is an integer number (1957080825).

Almost surely, 2^64000715860 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 64000715860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70454909700).

64000715860 is an abundant number, since it is smaller than the sum of its proper divisors (76909103540).

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

64000715860 is a wasteful number, since it uses less digits than its factorization.

64000715860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17737 (or 17712 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 64000715860 in words is "sixty-four billion, seven hundred fifteen thousand, eight hundred sixty".