79811475911964 has 24 divisors (see below), whose sum is σ = 206918641253520. Its totient is φ = 26603825303952.

The previous prime is 79811475911963. The next prime is 79811475911969. The reversal of 79811475911964 is 46911957411897.

79811475911964 is a `hidden beast` number, since 7 + 9 + 8 + 1 + 1 + 475 + 91 + 1 + 9 + 64 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 79811475911892 and 79811475911901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79811475911963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369497573559 + ... + 369497573774.

It is an arithmetic number, because the mean of its divisors is an integer number (8621610052230).

Almost surely, 2^{79811475911964} is an apocalyptic number.

It is an amenable number.

79811475911964 is an abundant number, since it is smaller than the sum of its proper divisors (127107165341556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79811475911964 is a wasteful number, since it uses less digits than its factorization.

79811475911964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738995147346 (or 738995147338 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 72.

The spelling of 79811475911964 in words is "seventy-nine trillion, eight hundred eleven billion, four hundred seventy-five million, nine hundred eleven thousand, nine hundred sixty-four".