79641823117 has 2 divisors, whose sum is σ = 79641823118. Its totient is φ = 79641823116.

The previous prime is 79641823087. The next prime is 79641823147. The reversal of 79641823117 is 71132814697.

It is a balanced prime because it is at equal distance from previous prime (79641823087) and next prime (79641823147).

It can be written as a sum of positive squares in only one way, i.e., 59153049796 + 20488773321 = 243214^2 + 143139^2 .

It is a cyclic number.

It is not a de Polignac number, because 79641823117 - 2¹⁹ = 79641298829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79641823147) 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 as a sum of consecutive naturals, namely, 39820911558 + 39820911559.

It is an arithmetic number, because the mean of its divisors is an integer number (39820911559).

Almost surely, 2^79641823117 is an apocalyptic number.

It is an amenable number.

79641823117 is a deficient number, since it is larger than the sum of its proper divisors (1).

79641823117 is an equidigital number, since it uses as much as digits as its factorization.

79641823117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The spelling of 79641823117 in words is "seventy-nine billion, six hundred forty-one million, eight hundred twenty-three thousand, one hundred seventeen".