64774845909 has 16 divisors (see below), whose sum is σ = 95979830400. Its totient is φ = 43175537568.

The previous prime is 64774845887. The next prime is 64774845911. The reversal of 64774845909 is 90954847746.

64774845909 is a `hidden beast` number, since 64 + 7 + 7 + 484 + 5 + 90 + 9 = 666.

It is not a de Polignac number, because 64774845909 - 2⁹ = 64774845397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64774845979) 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, 57249 + ... + 364454.

It is an arithmetic number, because the mean of its divisors is an integer number (5998739400).

Almost surely, 2^64774845909 is an apocalyptic number.

It is an amenable number.

64774845909 is a deficient number, since it is larger than the sum of its proper divisors (31204984491).

64774845909 is a wasteful number, since it uses less digits than its factorization.

64774845909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427401 (or 427395 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 64774845909 in words is "sixty-four billion, seven hundred seventy-four million, eight hundred forty-five thousand, nine hundred nine".