79980905416 has 8 divisors (see below), whose sum is σ = 149964197670. Its totient is φ = 39990452704.

The previous prime is 79980905413. The next prime is 79980905489. The reversal of 79980905416 is 61450908997.

It can be written as a sum of positive squares in only one way, i.e., 72334102500 + 7646802916 = 268950^2 + 87446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (79980905413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998806581 + ... + 4998806596.

Almost surely, 2^79980905416 is an apocalyptic number.

It is an amenable number.

79980905416 is a deficient number, since it is larger than the sum of its proper divisors (69983292254).

79980905416 is a wasteful number, since it uses less digits than its factorization.

79980905416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9997613183 (or 9997613179 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 79980905416 in words is "seventy-nine billion, nine hundred eighty million, nine hundred five thousand, four hundred sixteen".