79295747993857 has 4 divisors (see below), whose sum is σ = 80113229932036. Its totient is φ = 78478266055680.

The previous prime is 79295747993837. The next prime is 79295747993867. The reversal of 79295747993857 is 75839974759297.

It is a Cunningham number, because it is equal to 8904816²+1.

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 35606807516736 + 43688940477121 = 5967144^2 + 6609761^2 .

It is a cyclic number.

It is not a de Polignac number, because 79295747993857 - 2¹¹ = 79295747991809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79295747993827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408740968944 + ... + 408740969137.

It is an arithmetic number, because the mean of its divisors is an integer number (20028307483009).

Almost surely, 2^{79295747993857} is an apocalyptic number.

It is an amenable number.

79295747993857 is a deficient number, since it is larger than the sum of its proper divisors (817481938179).

79295747993857 is an equidigital number, since it uses as much as digits as its factorization.

79295747993857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817481938178.

The product of its digits is 75614212800, while the sum is 91.

The spelling of 79295747993857 in words is "seventy-nine trillion, two hundred ninety-five billion, seven hundred forty-seven million, nine hundred ninety-three thousand, eight hundred fifty-seven".