79356778824961 has 16 divisors (see below), whose sum is σ = 91703143889280. Its totient is φ = 67869441652480.

The previous prime is 79356778824959. The next prime is 79356778824991. The reversal of 79356778824961 is 16942887765397.

It is a cyclic number.

It is not a de Polignac number, because 79356778824961 - 2¹ = 79356778824959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79356778824901) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 91462501 + ... + 92326066.

It is an arithmetic number, because the mean of its divisors is an integer number (5731446493080).

Almost surely, 2^{79356778824961} is an apocalyptic number.

It is an amenable number.

79356778824961 is a deficient number, since it is larger than the sum of its proper divisors (12346365064319).

79356778824961 is a wasteful number, since it uses less digits than its factorization.

79356778824961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183790904.

The product of its digits is 7681443840, while the sum is 82.

The spelling of 79356778824961 in words is "seventy-nine trillion, three hundred fifty-six billion, seven hundred seventy-eight million, eight hundred twenty-four thousand, nine hundred sixty-one".