64917333497 has 16 divisors (see below), whose sum is σ = 69843332160. Its totient is φ = 60149598912.

The previous prime is 64917333491. The next prime is 64917333527. The reversal of 64917333497 is 79433371946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64917333497 - 2⁸ = 64917333241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64917333491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217538 + ... + 420900.

It is an arithmetic number, because the mean of its divisors is an integer number (4365208260).

Almost surely, 2^64917333497 is an apocalyptic number.

It is an amenable number.

64917333497 is a deficient number, since it is larger than the sum of its proper divisors (4925998663).

64917333497 is a wasteful number, since it uses less digits than its factorization.

64917333497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203752.

The product of its digits is 10287648, while the sum is 56.

The spelling of 64917333497 in words is "sixty-four billion, nine hundred seventeen million, three hundred thirty-three thousand, four hundred ninety-seven".