64972776875 has 40 divisors (see below), whose sum is σ = 83390818896. Its totient is φ = 50576000000.

The previous prime is 64972776823. The next prime is 64972776893. The reversal of 64972776875 is 57867727946.

It is not a de Polignac number, because 64972776875 - 2⁸ = 64972776619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10272464 + ... + 10278786.

Almost surely, 2^64972776875 is an apocalyptic number.

64972776875 is a deficient number, since it is larger than the sum of its proper divisors (18418042021).

64972776875 is an equidigital number, since it uses as much as digits as its factorization.

64972776875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785 (or 6770 counting only the distinct ones).

The product of its digits is 248935680, while the sum is 68.

The spelling of 64972776875 in words is "sixty-four billion, nine hundred seventy-two million, seven hundred seventy-six thousand, eight hundred seventy-five".