64392717320 has 32 divisors (see below), whose sum is σ = 144923411520. Its totient is φ = 25750011840.

The previous prime is 64392717287. The next prime is 64392717331. The reversal of 64392717320 is 2371729346.

64392717320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72422 + ... + 366101.

It is an arithmetic number, because the mean of its divisors is an integer number (4528856610).

Almost surely, 2^64392717320 is an apocalyptic number.

It is an amenable number.

64392717320 is an abundant number, since it is smaller than the sum of its proper divisors (80530694200).

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

64392717320 is a wasteful number, since it uses less digits than its factorization.

64392717320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442205 (or 442201 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 64392717320 in words is "sixty-four billion, three hundred ninety-two million, seven hundred seventeen thousand, three hundred twenty".