64646456695 has 4 divisors (see below), whose sum is σ = 77575748040. Its totient is φ = 51717165352.

The previous prime is 64646456683. The next prime is 64646456717. The reversal of 64646456695 is 59665464646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59665464646 = 2 ⋅29832732323.

It is a cyclic number.

It is not a de Polignac number, because 64646456695 - 2²⁹ = 64109585783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6464645665 + ... + 6464645674.

It is an arithmetic number, because the mean of its divisors is an integer number (19393937010).

Almost surely, 2^64646456695 is an apocalyptic number.

64646456695 is a deficient number, since it is larger than the sum of its proper divisors (12929291345).

64646456695 is a wasteful number, since it uses less digits than its factorization.

64646456695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12929291344.

The product of its digits is 111974400, while the sum is 61.

The spelling of 64646456695 in words is "sixty-four billion, six hundred forty-six million, four hundred fifty-six thousand, six hundred ninety-five".