79646340186 has 36 divisors (see below), whose sum is σ = 200741288202. Its totient is φ = 22756096944.

The previous prime is 79646340143. The next prime is 79646340203. The reversal of 79646340186 is 68104364697.

It can be written as a sum of positive squares in only one way, i.e., 79481705625 + 164634561 = 281925^2 + 12831^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45150105 + ... + 45151868.

Almost surely, 2^79646340186 is an apocalyptic number.

79646340186 is an abundant number, since it is smaller than the sum of its proper divisors (121094948016).

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

79646340186 is a wasteful number, since it uses less digits than its factorization.

79646340186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90301995 (or 90301985 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 79646340186 in words is "seventy-nine billion, six hundred forty-six million, three hundred forty thousand, one hundred eighty-six".