64636247807 has 2 divisors, whose sum is σ = 64636247808. Its totient is φ = 64636247806.

The previous prime is 64636247737. The next prime is 64636247813. The reversal of 64636247807 is 70874263646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64636247807 - 2²² = 64632053503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64636247867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32318123903 + 32318123904.

It is an arithmetic number, because the mean of its divisors is an integer number (32318123904).

Almost surely, 2^64636247807 is an apocalyptic number.

64636247807 is a deficient number, since it is larger than the sum of its proper divisors (1).

64636247807 is an equidigital number, since it uses as much as digits as its factorization.

64636247807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 64636247807 in words is "sixty-four billion, six hundred thirty-six million, two hundred forty-seven thousand, eight hundred seven".