64811671364913 has 16 divisors (see below), whose sum is σ = 94271729098752. Its totient is φ = 39279714530000.

The previous prime is 64811671364879. The next prime is 64811671364929. The reversal of 64811671364913 is 31946317611846.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64811671364913 - 2²² = 64811667170609 is a prime.

It is a super-2 number, since 2×64811671364913² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64811671364213) 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, 15167128 + ... + 18964838.

It is an arithmetic number, because the mean of its divisors is an integer number (5891983068672).

Almost surely, 2^{64811671364913} is an apocalyptic number.

It is an amenable number.

64811671364913 is a deficient number, since it is larger than the sum of its proper divisors (29460057733839).

64811671364913 is a wasteful number, since it uses less digits than its factorization.

64811671364913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4314876.

The product of its digits is 15676416, while the sum is 60.

The spelling of 64811671364913 in words is "sixty-four trillion, eight hundred eleven billion, six hundred seventy-one million, three hundred sixty-four thousand, nine hundred thirteen".