29129707881 has 24 divisors (see below), whose sum is σ = 43068538656. Its totient is φ = 18962112960.

The previous prime is 29129707879. The next prime is 29129707889. The reversal of 29129707881 is 18870792192.

It is not a de Polignac number, because 29129707881 - 2¹ = 29129707879 is a prime.

It is a super-2 number, since 2×29129707881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29129707889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1418221 + ... + 1438613.

It is an arithmetic number, because the mean of its divisors is an integer number (1794522444).

Almost surely, 2^29129707881 is an apocalyptic number.

It is an amenable number.

29129707881 is a deficient number, since it is larger than the sum of its proper divisors (13938830775).

29129707881 is a wasteful number, since it uses less digits than its factorization.

29129707881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24133 (or 24130 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 29129707881 in words is "twenty-nine billion, one hundred twenty-nine million, seven hundred seven thousand, eight hundred eighty-one".