29027611681 has 2 divisors, whose sum is σ = 29027611682. Its totient is φ = 29027611680.

The previous prime is 29027611637. The next prime is 29027611687. The reversal of 29027611681 is 18611672092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24573384081 + 4454227600 = 156759^2 + 66740^2 .

It is a cyclic number.

It is not a de Polignac number, because 29027611681 - 2⁹ = 29027611169 is a prime.

It is a super-2 number, since 2×29027611681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29027611687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14513805840 + 14513805841.

It is an arithmetic number, because the mean of its divisors is an integer number (14513805841).

Almost surely, 2^29027611681 is an apocalyptic number.

It is an amenable number.

29027611681 is a deficient number, since it is larger than the sum of its proper divisors (1).

29027611681 is an equidigital number, since it uses as much as digits as its factorization.

29027611681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 29027611681 in words is "twenty-nine billion, twenty-seven million, six hundred eleven thousand, six hundred eighty-one".