78113122917 has 8 divisors (see below), whose sum is σ = 104774488896. Its totient is φ = 51763586112.

The previous prime is 78113122897. The next prime is 78113122949. The reversal of 78113122917 is 71922131187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-78113122917 is a prime.

It is a super-2 number, since 2×78113122917² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78113122987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77956708 + ... + 77957709.

It is an arithmetic number, because the mean of its divisors is an integer number (13096811112).

Almost surely, 2^78113122917 is an apocalyptic number.

It is an amenable number.

78113122917 is a deficient number, since it is larger than the sum of its proper divisors (26661365979).

78113122917 is a wasteful number, since it uses less digits than its factorization.

78113122917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155914587.

The product of its digits is 42336, while the sum is 42.

The spelling of 78113122917 in words is "seventy-eight billion, one hundred thirteen million, one hundred twenty-two thousand, nine hundred seventeen".