79981809829376 has 640 divisors, whose sum is σ = 200702836029696. Its totient is φ = 31004546826240.

The previous prime is 79981809829307. The next prime is 79981809829393. The reversal of 79981809829376 is 67392890818997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 255532938596 + ... + 255532938908.

Almost surely, 2^{79981809829376} 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 79981809829376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100351418014848).

79981809829376 is an abundant number, since it is smaller than the sum of its proper divisors (120721026200320).

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

79981809829376 is a wasteful number, since it uses less digits than its factorization.

79981809829376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 5925685248, while the sum is 86.

The spelling of 79981809829376 in words is "seventy-nine trillion, nine hundred eighty-one billion, eight hundred nine million, eight hundred twenty-nine thousand, three hundred seventy-six".