29549968081 has 2 divisors, whose sum is σ = 29549968082. Its totient is φ = 29549968080.

The previous prime is 29549968073. The next prime is 29549968163. The reversal of 29549968081 is 18086994592.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18274713856 + 11275254225 = 135184^2 + 106185^2 .

It is a cyclic number.

It is not a de Polignac number, because 29549968081 - 2³ = 29549968073 is a prime.

It is a super-2 number, since 2×29549968081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29549968061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14774984040 + 14774984041.

It is an arithmetic number, because the mean of its divisors is an integer number (14774984041).

Almost surely, 2^29549968081 is an apocalyptic number.

It is an amenable number.

29549968081 is a deficient number, since it is larger than the sum of its proper divisors (1).

29549968081 is an equidigital number, since it uses as much as digits as its factorization.

29549968081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 29549968081 in words is "twenty-nine billion, five hundred forty-nine million, nine hundred sixty-eight thousand, eighty-one".