7813117917 has 48 divisors (see below), whose sum is σ = 12933648000. Its totient is φ = 4498750080.

The previous prime is 7813117867. The next prime is 7813117919. The reversal of 7813117917 is 7197113187.

It is a de Polignac number, because none of the positive numbers 2^k-7813117917 is a prime.

It is a super-2 number, since 2×7813117917² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7813117919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 327759 + ... + 350787.

It is an arithmetic number, because the mean of its divisors is an integer number (269451000).

Almost surely, 2^7813117917 is an apocalyptic number.

It is an amenable number.

7813117917 is a deficient number, since it is larger than the sum of its proper divisors (5120530083).

7813117917 is a wasteful number, since it uses less digits than its factorization.

7813117917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23218 (or 23215 counting only the distinct ones).

The product of its digits is 74088, while the sum is 45.

The square root of 7813117917 is about 88391.8430456114. The cubic root of 7813117917 is about 1984.3036272929.

The spelling of 7813117917 in words is "seven billion, eight hundred thirteen million, one hundred seventeen thousand, nine hundred seventeen".