64339928577 has 48 divisors (see below), whose sum is σ = 105993059328. Its totient is φ = 37369221120.

The previous prime is 64339928573. The next prime is 64339928617. The reversal of 64339928577 is 77582993346.

64339928577 is a `hidden beast` number, since 6 + 4 + 3 + 39 + 9 + 28 + 577 = 666.

It is not a de Polignac number, because 64339928577 - 2² = 64339928573 is a prime.

It is a super-2 number, since 2×64339928577² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64339928573) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185808 + ... + 403985.

It is an arithmetic number, because the mean of its divisors is an integer number (2208188736).

Almost surely, 2^64339928577 is an apocalyptic number.

It is an amenable number.

64339928577 is a deficient number, since it is larger than the sum of its proper divisors (41653130751).

64339928577 is a wasteful number, since it uses less digits than its factorization.

64339928577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589870 (or 589867 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 64339928577 in words is "sixty-four billion, three hundred thirty-nine million, nine hundred twenty-eight thousand, five hundred seventy-seven".