79021954080 has 240 divisors, whose sum is σ = 295287272280. Its totient is φ = 19832905728.

The previous prime is 79021954079. The next prime is 79021954087. The reversal of 79021954080 is 8045912097.

79021954080 is a `hidden beast` number, since 7 + 9 + 0 + 21 + 9 + 540 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 70719828624 + 8302125456 = 265932^2 + 91116^2 .

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79021954087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40986 + ... + 399654.

Almost surely, 2^79021954080 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 79021954080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147643636140).

79021954080 is an abundant number, since it is smaller than the sum of its proper divisors (216265318200).

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

79021954080 is a wasteful number, since it uses less digits than its factorization.

79021954080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358713 (or 358696 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 79021954080 in words is "seventy-nine billion, twenty-one million, nine hundred fifty-four thousand, eighty".