79905720976 has 45 divisors (see below), whose sum is σ = 164499508219. Its totient is φ = 37593646592.

The previous prime is 79905720971. The next prime is 79905721001. The reversal of 79905720976 is 67902750997.

The square root of 79905720976 is 282676.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4917375376 + 74988345600 = 70124^2 + 273840^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79905720971) 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 8 ways as a sum of consecutive naturals, for example, 19219890 + ... + 19224046.

Almost surely, 2^79905720976 is an apocalyptic number.

79905720976 is the 282676-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79905720976

79905720976 is an abundant number, since it is smaller than the sum of its proper divisors (84593787243).

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

79905720976 is an frugal number, since it uses more digits than its factorization.

79905720976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 4176 counting only the distinct ones).

The product of its (nonzero) digits is 15002820, while the sum is 61.

The spelling of 79905720976 in words is "seventy-nine billion, nine hundred five million, seven hundred twenty thousand, nine hundred seventy-six".