756316681 has 2 divisors, whose sum is σ = 756316682. Its totient is φ = 756316680.

The previous prime is 756316657. The next prime is 756316721. The reversal of 756316681 is 186613657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488012281 + 268304400 = 22091^2 + 16380^2 .

It is a cyclic number.

It is not a de Polignac number, because 756316681 - 2¹¹ = 756314633 is a prime.

It is a super-2 number, since 2×756316681² = 1144029843917711522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (756316601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378158340 + 378158341.

It is an arithmetic number, because the mean of its divisors is an integer number (378158341).

Almost surely, 2^756316681 is an apocalyptic number.

It is an amenable number.

756316681 is a deficient number, since it is larger than the sum of its proper divisors (1).

756316681 is an equidigital number, since it uses as much as digits as its factorization.

756316681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 756316681 is about 27501.2123550945. The cubic root of 756316681 is about 911.1038735456.

The spelling of 756316681 in words is "seven hundred fifty-six million, three hundred sixteen thousand, six hundred eighty-one".