29911010681 has 2 divisors, whose sum is σ = 29911010682. Its totient is φ = 29911010680.

The previous prime is 29911010677. The next prime is 29911010693. The reversal of 29911010681 is 18601011992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20339323456 + 9571687225 = 142616^2 + 97835^2 .

It is a cyclic number.

It is not a de Polignac number, because 29911010681 - 2² = 29911010677 is a prime.

It is a super-2 number, since 2×29911010681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29911010081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14955505340 + 14955505341.

It is an arithmetic number, because the mean of its divisors is an integer number (14955505341).

Almost surely, 2^29911010681 is an apocalyptic number.

It is an amenable number.

29911010681 is a deficient number, since it is larger than the sum of its proper divisors (1).

29911010681 is an equidigital number, since it uses as much as digits as its factorization.

29911010681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 29911010681 in words is "twenty-nine billion, nine hundred eleven million, ten thousand, six hundred eighty-one".