8618313157 has 2 divisors, whose sum is σ = 8618313158. Its totient is φ = 8618313156.

The previous prime is 8618313139. The next prime is 8618313161. The reversal of 8618313157 is 7513138168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7024786596 + 1593526561 = 83814^2 + 39919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8618313157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8618311157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4309156578 + 4309156579.

It is an arithmetic number, because the mean of its divisors is an integer number (4309156579).

Almost surely, 2^8618313157 is an apocalyptic number.

It is an amenable number.

8618313157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8618313157 is an equidigital number, since it uses as much as digits as its factorization.

8618313157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 8618313157 is about 92834.8703720752. The cubic root of 8618313157 is about 2050.2528466235.

The spelling of 8618313157 in words is "eight billion, six hundred eighteen million, three hundred thirteen thousand, one hundred fifty-seven".