7608857681 has 2 divisors, whose sum is σ = 7608857682. Its totient is φ = 7608857680.

The previous prime is 7608857657. The next prime is 7608857731. The reversal of 7608857681 is 1867588067.

7608857681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4777021456 + 2831836225 = 69116^2 + 53215^2 .

It is a cyclic number.

It is not a de Polignac number, because 7608857681 - 2⁶ = 7608857617 is a prime.

It is a super-2 number, since 2×7608857681² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7608857381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3804428840 + 3804428841.

It is an arithmetic number, because the mean of its divisors is an integer number (3804428841).

Almost surely, 2^7608857681 is an apocalyptic number.

It is an amenable number.

7608857681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7608857681 is an equidigital number, since it uses as much as digits as its factorization.

7608857681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The square root of 7608857681 is about 87228.7663617915. The cubic root of 7608857681 is about 1966.8586661381.

The spelling of 7608857681 in words is "seven billion, six hundred eight million, eight hundred fifty-seven thousand, six hundred eighty-one".