64812316957 has 16 divisors (see below), whose sum is σ = 65703312000. Its totient is φ = 63928457920.

The previous prime is 64812316909. The next prime is 64812316981. The reversal of 64812316957 is 75961321846.

It is a cyclic number.

It is not a de Polignac number, because 64812316957 - 2²⁷ = 64678099229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64812316997) 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, 27496623 + ... + 27498979.

It is an arithmetic number, because the mean of its divisors is an integer number (4106457000).

Almost surely, 2^64812316957 is an apocalyptic number.

It is an amenable number.

64812316957 is a deficient number, since it is larger than the sum of its proper divisors (890995043).

64812316957 is a wasteful number, since it uses less digits than its factorization.

64812316957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716.

The product of its digits is 2177280, while the sum is 52.

The spelling of 64812316957 in words is "sixty-four billion, eight hundred twelve million, three hundred sixteen thousand, nine hundred fifty-seven".