29681269871 has 24 divisors (see below), whose sum is σ = 33559813392. Its totient is φ = 26212032000.

The previous prime is 29681269853. The next prime is 29681269873. The reversal of 29681269871 is 17896218692.

It is a de Polignac number, because none of the positive numbers 2^k-29681269871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29681269871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29681269873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3008096 + ... + 3017946.

It is an arithmetic number, because the mean of its divisors is an integer number (1398325558).

Almost surely, 2^29681269871 is an apocalyptic number.

29681269871 is a deficient number, since it is larger than the sum of its proper divisors (3878543521).

29681269871 is a wasteful number, since it uses less digits than its factorization.

29681269871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10583 (or 10572 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 59.

The spelling of 29681269871 in words is "twenty-nine billion, six hundred eighty-one million, two hundred sixty-nine thousand, eight hundred seventy-one".