29996772891 has 32 divisors (see below), whose sum is σ = 43988520960. Its totient is φ = 18120246144.

The previous prime is 29996772877. The next prime is 29996772931. The reversal of 29996772891 is 19827769992.

It is not a de Polignac number, because 29996772891 - 2¹⁷ = 29996641819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (29996772191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35371 + ... + 247476.

It is an arithmetic number, because the mean of its divisors is an integer number (1374641280).

Almost surely, 2^29996772891 is an apocalyptic number.

29996772891 is a deficient number, since it is larger than the sum of its proper divisors (13991748069).

29996772891 is a wasteful number, since it uses less digits than its factorization.

29996772891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282955.

The product of its digits is 61725888, while the sum is 69.

The spelling of 29996772891 in words is "twenty-nine billion, nine hundred ninety-six million, seven hundred seventy-two thousand, eight hundred ninety-one".