64683964957 has 16 divisors (see below), whose sum is σ = 66820723200. Its totient is φ = 62583956032.

The previous prime is 64683964927. The next prime is 64683964967. The reversal of 64683964957 is 75946938646.

It is a cyclic number.

It is not a de Polignac number, because 64683964957 - 2¹⁵ = 64683932189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64683964892 and 64683964901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64683964927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2437044 + ... + 2463442.

It is an arithmetic number, because the mean of its divisors is an integer number (4176295200).

Almost surely, 2^64683964957 is an apocalyptic number.

It is an amenable number.

64683964957 is a deficient number, since it is larger than the sum of its proper divisors (2136758243).

64683964957 is a wasteful number, since it uses less digits than its factorization.

64683964957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27092.

The product of its digits is 235146240, while the sum is 67.

The spelling of 64683964957 in words is "sixty-four billion, six hundred eighty-three million, nine hundred sixty-four thousand, nine hundred fifty-seven".