29942155491 has 4 divisors (see below), whose sum is σ = 39922873992. Its totient is φ = 19961436992.

The previous prime is 29942155487. The next prime is 29942155511. The reversal of 29942155491 is 19455124992.

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

It is a cyclic number.

It is not a de Polignac number, because 29942155491 - 2² = 29942155487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29942155091) 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 in 3 ways as a sum of consecutive naturals, for example, 4990359246 + ... + 4990359251.

It is an arithmetic number, because the mean of its divisors is an integer number (9980718498).

Almost surely, 2^29942155491 is an apocalyptic number.

29942155491 is a deficient number, since it is larger than the sum of its proper divisors (9980718501).

29942155491 is an equidigital number, since it uses as much as digits as its factorization.

29942155491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980718500.

The product of its digits is 1166400, while the sum is 51.

The spelling of 29942155491 in words is "twenty-nine billion, nine hundred forty-two million, one hundred fifty-five thousand, four hundred ninety-one".