64718835413 has 4 divisors (see below), whose sum is σ = 64722499500. Its totient is φ = 64715171328.

The previous prime is 64718835331. The next prime is 64718835431. The reversal of 64718835413 is 31453881746.

64718835413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24983595844 + 39735239569 = 158062^2 + 199337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64718835413 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 (64718835613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805420 + ... + 1840917.

It is an arithmetic number, because the mean of its divisors is an integer number (16180624875).

Almost surely, 2^64718835413 is an apocalyptic number.

It is an amenable number.

64718835413 is a deficient number, since it is larger than the sum of its proper divisors (3664087).

64718835413 is a wasteful number, since it uses less digits than its factorization.

64718835413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664086.

The product of its digits is 1935360, while the sum is 50.

The spelling of 64718835413 in words is "sixty-four billion, seven hundred eighteen million, eight hundred thirty-five thousand, four hundred thirteen".