64907376991 has 2 divisors, whose sum is σ = 64907376992. Its totient is φ = 64907376990.

The previous prime is 64907376929. The next prime is 64907377001. The reversal of 64907376991 is 19967370946.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64907376991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64907376901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32453688495 + 32453688496.

It is an arithmetic number, because the mean of its divisors is an integer number (32453688496).

Almost surely, 2^64907376991 is an apocalyptic number.

64907376991 is a deficient number, since it is larger than the sum of its proper divisors (1).

64907376991 is an equidigital number, since it uses as much as digits as its factorization.

64907376991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 61.

The spelling of 64907376991 in words is "sixty-four billion, nine hundred seven million, three hundred seventy-six thousand, nine hundred ninety-one".