30696620681 has 2 divisors, whose sum is σ = 30696620682. Its totient is φ = 30696620680.

The previous prime is 30696620659. The next prime is 30696620693. The reversal of 30696620681 is 18602669603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26763324025 + 3933296656 = 163595^2 + 62716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30696620681 is a prime.

It is a super-2 number, since 2×30696620681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30696620641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15348310340 + 15348310341.

It is an arithmetic number, because the mean of its divisors is an integer number (15348310341).

Almost surely, 2^30696620681 is an apocalyptic number.

It is an amenable number.

30696620681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30696620681 is an equidigital number, since it uses as much as digits as its factorization.

30696620681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 30696620681 in words is "thirty billion, six hundred ninety-six million, six hundred twenty thousand, six hundred eighty-one".