29289812885 has 4 divisors (see below), whose sum is σ = 35147775468. Its totient is φ = 23431850304.

The previous prime is 29289812821. The next prime is 29289812891. The reversal of 29289812885 is 58821898292.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22267205284 + 7022607601 = 149222^2 + 83801^2 .

It is a cyclic number.

It is not a de Polignac number, because 29289812885 - 2⁶ = 29289812821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2928981284 + ... + 2928981293.

It is an arithmetic number, because the mean of its divisors is an integer number (8786943867).

Almost surely, 2^29289812885 is an apocalyptic number.

It is an amenable number.

29289812885 is a deficient number, since it is larger than the sum of its proper divisors (5857962583).

29289812885 is an equidigital number, since it uses as much as digits as its factorization.

29289812885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5857962582.

The product of its digits is 13271040, while the sum is 62.

The spelling of 29289812885 in words is "twenty-nine billion, two hundred eighty-nine million, eight hundred twelve thousand, eight hundred eighty-five".