79811475911968 has 72 divisors (see below), whose sum is σ = 166971995898372. Its totient is φ = 37545610051584.

The previous prime is 79811475911963. The next prime is 79811475911969. The reversal of 79811475911968 is 86911957411897.

It can be written as a sum of positive squares in 6 ways, for example, as 49355514521104 + 30455961390864 = 7025348^2 + 5518692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79811475911894 and 79811475911903.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25848096 + ... + 28770592.

Almost surely, 2^{79811475911968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79811475911968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83485997949186).

79811475911968 is an abundant number, since it is smaller than the sum of its proper divisors (87160519986404).

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

79811475911968 is a wasteful number, since it uses less digits than its factorization.

79811475911968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925494 (or 2925469 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 76.

The spelling of 79811475911968 in words is "seventy-nine trillion, eight hundred eleven billion, four hundred seventy-five million, nine hundred eleven thousand, nine hundred sixty-eight".