7256432681 has 2 divisors, whose sum is σ = 7256432682. Its totient is φ = 7256432680.

The previous prime is 7256432647. The next prime is 7256432719. The reversal of 7256432681 is 1862346527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7102275625 + 154157056 = 84275^2 + 12416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7256432681 is a prime.

It is a super-2 number, since 2×7256432681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7256438681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628216340 + 3628216341.

It is an arithmetic number, because the mean of its divisors is an integer number (3628216341).

Almost surely, 2^7256432681 is an apocalyptic number.

It is an amenable number.

7256432681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7256432681 is an equidigital number, since it uses as much as digits as its factorization.

7256432681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The square root of 7256432681 is about 85184.6974579355. The cubic root of 7256432681 is about 1936.0105675301.

The spelling of 7256432681 in words is "seven billion, two hundred fifty-six million, four hundred thirty-two thousand, six hundred eighty-one".