64368293977 has 16 divisors (see below), whose sum is σ = 71671093200. Its totient is φ = 57422967552.

The previous prime is 64368293909. The next prime is 64368293981. The reversal of 64368293977 is 77939286346.

It can be written as a sum of positive squares in 8 ways, for example, as 205377561 + 64162916416 = 14331^2 + 253304^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64368293977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64368293377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377398 + ... + 520735.

It is an arithmetic number, because the mean of its divisors is an integer number (4479443325).

Almost surely, 2^64368293977 is an apocalyptic number.

It is an amenable number.

64368293977 is a deficient number, since it is larger than the sum of its proper divisors (7302799223).

64368293977 is a wasteful number, since it uses less digits than its factorization.

64368293977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898332.

The product of its digits is 82301184, while the sum is 64.

The spelling of 64368293977 in words is "sixty-four billion, three hundred sixty-eight million, two hundred ninety-three thousand, nine hundred seventy-seven".