64217730499 has 12 divisors (see below), whose sum is σ = 71154702696. Its totient is φ = 57899342592.

The previous prime is 64217730481. The next prime is 64217730553. The reversal of 64217730499 is 99403771246.

It is not a de Polignac number, because 64217730499 - 2²⁷ = 64083512771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64217730449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4411182 + ... + 4425715.

It is an arithmetic number, because the mean of its divisors is an integer number (5929558558).

Almost surely, 2^64217730499 is an apocalyptic number.

64217730499 is a deficient number, since it is larger than the sum of its proper divisors (6936972197).

64217730499 is a wasteful number, since it uses less digits than its factorization.

64217730499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836966 (or 8836953 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 64217730499 in words is "sixty-four billion, two hundred seventeen million, seven hundred thirty thousand, four hundred ninety-nine".