8118831857 has 2 divisors, whose sum is σ = 8118831858. Its totient is φ = 8118831856.

The previous prime is 8118831827. The next prime is 8118831863. The reversal of 8118831857 is 7581388118.

8118831857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7790533696 + 328298161 = 88264^2 + 18119^2 .

It is a cyclic number.

It is not a de Polignac number, because 8118831857 - 2²⁰ = 8117783281 is a prime.

It is a super-3 number, since 3×8118831857³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8118831827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4059415928 + 4059415929.

It is an arithmetic number, because the mean of its divisors is an integer number (4059415929).

Almost surely, 2^8118831857 is an apocalyptic number.

It is an amenable number.

8118831857 is a deficient number, since it is larger than the sum of its proper divisors (1).

8118831857 is an equidigital number, since it uses as much as digits as its factorization.

8118831857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 50.

The square root of 8118831857 is about 90104.5606892348. The cubic root of 8118831857 is about 2009.8540241174.

The spelling of 8118831857 in words is "eight billion, one hundred eighteen million, eight hundred thirty-one thousand, eight hundred fifty-seven".