64994473613 has 8 divisors (see below), whose sum is σ = 67094012160. Its totient is φ = 62895119040.

The previous prime is 64994473603. The next prime is 64994473637. The reversal of 64994473613 is 31637449946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64994473613 - 2²⁴ = 64977696397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64994473603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271006 + ... + 1321152.

It is an arithmetic number, because the mean of its divisors is an integer number (8386751520).

Almost surely, 2^64994473613 is an apocalyptic number.

It is an amenable number.

64994473613 is a deficient number, since it is larger than the sum of its proper divisors (2099538547).

64994473613 is a wasteful number, since it uses less digits than its factorization.

64994473613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91987.

The product of its digits is 11757312, while the sum is 56.

The spelling of 64994473613 in words is "sixty-four billion, nine hundred ninety-four million, four hundred seventy-three thousand, six hundred thirteen".