64717764705 has 48 divisors (see below), whose sum is σ = 122422622400. Its totient is φ = 31366204800.

The previous prime is 64717764703. The next prime is 64717764719. The reversal of 64717764705 is 50746771746.

It is a happy number.

64717764705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64717764705 - 2¹ = 64717764703 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64717764703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1332946 + ... + 1380644.

It is an arithmetic number, because the mean of its divisors is an integer number (2550471300).

Almost surely, 2^64717764705 is an apocalyptic number.

It is an amenable number.

64717764705 is a deficient number, since it is larger than the sum of its proper divisors (57704857695).

64717764705 is a wasteful number, since it uses less digits than its factorization.

64717764705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50462 (or 50459 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 54.

The spelling of 64717764705 in words is "sixty-four billion, seven hundred seventeen million, seven hundred sixty-four thousand, seven hundred five".