64685418698 has 16 divisors (see below), whose sum is σ = 98437583880. Its totient is φ = 31873614336.

The previous prime is 64685418697. The next prime is 64685418719. The reversal of 64685418698 is 89681458646.

64685418698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 63709293649 + 976125049 = 252407^2 + 31243^2 .

It is not an unprimeable number, because it can be changed into a prime (64685418697) 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, 815 + ... + 359682.

Almost surely, 2^64685418698 is an apocalyptic number.

64685418698 is a deficient number, since it is larger than the sum of its proper divisors (33752165182).

64685418698 is a wasteful number, since it uses less digits than its factorization.

64685418698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361801.

The product of its digits is 79626240, while the sum is 65.

The spelling of 64685418698 in words is "sixty-four billion, six hundred eighty-five million, four hundred eighteen thousand, six hundred ninety-eight".