64207772591 has 2 divisors, whose sum is σ = 64207772592. Its totient is φ = 64207772590.

The previous prime is 64207772579. The next prime is 64207772597. The reversal of 64207772591 is 19527770246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64207772591 - 2²² = 64203578287 is a prime.

It is a super-2 number, since 2×64207772591² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64207772597) 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 as a sum of consecutive naturals, namely, 32103886295 + 32103886296.

It is an arithmetic number, because the mean of its divisors is an integer number (32103886296).

Almost surely, 2^64207772591 is an apocalyptic number.

64207772591 is a deficient number, since it is larger than the sum of its proper divisors (1).

64207772591 is an equidigital number, since it uses as much as digits as its factorization.

64207772591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 64207772591 in words is "sixty-four billion, two hundred seven million, seven hundred seventy-two thousand, five hundred ninety-one".