64976765911 has 2 divisors, whose sum is σ = 64976765912. Its totient is φ = 64976765910.

The previous prime is 64976765767. The next prime is 64976765921. The reversal of 64976765911 is 11956767946.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64976765911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64976765911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64976765921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32488382955 + 32488382956.

It is an arithmetic number, because the mean of its divisors is an integer number (32488382956).

Almost surely, 2^64976765911 is an apocalyptic number.

64976765911 is a deficient number, since it is larger than the sum of its proper divisors (1).

64976765911 is an equidigital number, since it uses as much as digits as its factorization.

64976765911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 61.

The spelling of 64976765911 in words is "sixty-four billion, nine hundred seventy-six million, seven hundred sixty-five thousand, nine hundred eleven".