79769722001 has 4 divisors (see below), whose sum is σ = 82520402100. Its totient is φ = 77019041904.

The previous prime is 79769721991. The next prime is 79769722003. The reversal of 79769722001 is 10022796797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45239163025 + 34530558976 = 212695^2 + 185824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79769722001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79769722003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375340006 + ... + 1375340063.

It is an arithmetic number, because the mean of its divisors is an integer number (20630100525).

Almost surely, 2^79769722001 is an apocalyptic number.

It is an amenable number.

79769722001 is a deficient number, since it is larger than the sum of its proper divisors (2750680099).

79769722001 is a wasteful number, since it uses less digits than its factorization.

79769722001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750680098.

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 79769722001 in words is "seventy-nine billion, seven hundred sixty-nine million, seven hundred twenty-two thousand, one".