79961697280 has 88 divisors (see below), whose sum is σ = 192993157872. Its totient is φ = 31788122112.

The previous prime is 79961697247. The next prime is 79961697281. The reversal of 79961697280 is 8279616997.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (79961697281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786654 + ... + 882466.

Almost surely, 2^79961697280 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 79961697280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96496578936).

79961697280 is an abundant number, since it is smaller than the sum of its proper divisors (113031460592).

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

79961697280 is a wasteful number, since it uses less digits than its factorization.

79961697280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96001 (or 95983 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 79961697280 in words is "seventy-nine billion, nine hundred sixty-one million, six hundred ninety-seven thousand, two hundred eighty".