64576717240 has 128 divisors (see below), whose sum is σ = 167940241920. Its totient is φ = 21890419200.

The previous prime is 64576717213. The next prime is 64576717273. The reversal of 64576717240 is 4271767546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10377330 + ... + 10383550.

It is an arithmetic number, because the mean of its divisors is an integer number (1312033140).

Almost surely, 2^64576717240 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 64576717240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83970120960).

64576717240 is an abundant number, since it is smaller than the sum of its proper divisors (103363524680).

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

64576717240 is a wasteful number, since it uses less digits than its factorization.

64576717240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653 (or 6649 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 64576717240 in words is "sixty-four billion, five hundred seventy-six million, seven hundred seventeen thousand, two hundred forty".