79518938253841 has 2 divisors, whose sum is σ = 79518938253842. Its totient is φ = 79518938253840.

The previous prime is 79518938253773. The next prime is 79518938253943. The reversal of 79518938253841 is 14835283981597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79464833633025 + 54104620816 = 8914305^2 + 232604^2 .

It is a cyclic number.

It is not a de Polignac number, because 79518938253841 - 2¹¹ = 79518938251793 is a prime.

It is not a weakly prime, because it can be changed into another prime (79518938253641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39759469126920 + 39759469126921.

It is an arithmetic number, because the mean of its divisors is an integer number (39759469126921).

Almost surely, 2^{79518938253841} is an apocalyptic number.

It is an amenable number.

79518938253841 is a deficient number, since it is larger than the sum of its proper divisors (1).

79518938253841 is an equidigital number, since it uses as much as digits as its factorization.

79518938253841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522547200, while the sum is 73.

The spelling of 79518938253841 in words is "seventy-nine trillion, five hundred eighteen billion, nine hundred thirty-eight million, two hundred fifty-three thousand, eight hundred forty-one".