79780649204 has 12 divisors (see below), whose sum is σ = 142250403204. Its totient is φ = 39137676864.

The previous prime is 79780649183. The next prime is 79780649233. The reversal of 79780649204 is 40294608797.

It can be written as a sum of positive squares in 2 ways, for example, as 44512560400 + 35268088804 = 210980^2 + 187798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 79780649204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188161697 + ... + 188162120.

It is an arithmetic number, because the mean of its divisors is an integer number (11854200267).

Almost surely, 2^79780649204 is an apocalyptic number.

It is an amenable number.

79780649204 is a deficient number, since it is larger than the sum of its proper divisors (62469754000).

79780649204 is a wasteful number, since it uses less digits than its factorization.

79780649204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376323874 (or 376323872 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 79780649204 in words is "seventy-nine billion, seven hundred eighty million, six hundred forty-nine thousand, two hundred four".