78393873113 has 4 divisors (see below), whose sum is σ = 78394935780. Its totient is φ = 78392810448.

The previous prime is 78393873091. The next prime is 78393873157. The reversal of 78393873113 is 31137839387.

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 68514109504 + 9879763609 = 261752^2 + 99397^2 .

It is a cyclic number.

It is not a de Polignac number, because 78393873113 - 2⁸ = 78393872857 is a prime.

It is a super-2 number, since 2×78393873113² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78393893113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411698 + ... + 571211.

It is an arithmetic number, because the mean of its divisors is an integer number (19598733945).

Almost surely, 2^78393873113 is an apocalyptic number.

It is an amenable number.

78393873113 is a deficient number, since it is larger than the sum of its proper divisors (1062667).

78393873113 is an equidigital number, since it uses as much as digits as its factorization.

78393873113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062666.

The product of its digits is 2286144, while the sum is 53.

The spelling of 78393873113 in words is "seventy-eight billion, three hundred ninety-three million, eight hundred seventy-three thousand, one hundred thirteen".