79817911488 has 224 divisors, whose sum is σ = 283946803200. Its totient is φ = 21463584768.

The previous prime is 79817911483. The next prime is 79817911493. The reversal of 79817911488 is 88411971897.

79817911488 is a `hidden beast` number, since 7 + 9 + 81 + 79 + 1 + 1 + 488 = 666.

It is an interprime number because it is at equal distance from previous prime (79817911483) and next prime (79817911493).

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (79817911483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11553 + ... + 399711.

Almost surely, 2^79817911488 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 79817911488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141973401600).

79817911488 is an abundant number, since it is smaller than the sum of its proper divisors (204128891712).

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

79817911488 is a wasteful number, since it uses less digits than its factorization.

79817911488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388204 (or 388188 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 63.

The spelling of 79817911488 in words is "seventy-nine billion, eight hundred seventeen million, nine hundred eleven thousand, four hundred eighty-eight".