7657716457 has 2 divisors, whose sum is σ = 7657716458. Its totient is φ = 7657716456.

The previous prime is 7657716449. The next prime is 7657716497. The reversal of 7657716457 is 7546177567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4571247321 + 3086469136 = 67611^2 + 55556^2 .

It is a cyclic number.

It is not a de Polignac number, because 7657716457 - 2³ = 7657716449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7657716398 and 7657716407.

It is not a weakly prime, because it can be changed into another prime (7657716427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828858228 + 3828858229.

It is an arithmetic number, because the mean of its divisors is an integer number (3828858229).

Almost surely, 2^7657716457 is an apocalyptic number.

It is an amenable number.

7657716457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7657716457 is an equidigital number, since it uses as much as digits as its factorization.

7657716457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8643600, while the sum is 55.

The square root of 7657716457 is about 87508.3793530654. The cubic root of 7657716457 is about 1971.0596184831.

The spelling of 7657716457 in words is "seven billion, six hundred fifty-seven million, seven hundred sixteen thousand, four hundred fifty-seven".