79518938253943 has 2 divisors, whose sum is σ = 79518938253944. Its totient is φ = 79518938253942.

The previous prime is 79518938253841. The next prime is 79518938253947. The reversal of 79518938253943 is 34935283981597.

It is a strong prime.

It is an emirp because it is prime and its reverse (34935283981597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79518938253943 - 2³⁷ = 79381499300471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79518938253943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79518938253947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39759469126971 + 39759469126972.

It is an arithmetic number, because the mean of its divisors is an integer number (39759469126972).

Almost surely, 2^{79518938253943} is an apocalyptic number.

79518938253943 is a deficient number, since it is larger than the sum of its proper divisors (1).

79518938253943 is an equidigital number, since it uses as much as digits as its factorization.

79518938253943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1763596800, while the sum is 76.

The spelling of 79518938253943 in words is "seventy-nine trillion, five hundred eighteen billion, nine hundred thirty-eight million, two hundred fifty-three thousand, nine hundred forty-three".