29955605897 has 4 divisors (see below), whose sum is σ = 34234978176. Its totient is φ = 25676233620.

The previous prime is 29955605893. The next prime is 29955605923. The reversal of 29955605897 is 79850655992.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29955605897 - 2² = 29955605893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29955605891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139686129 + ... + 2139686142.

It is an arithmetic number, because the mean of its divisors is an integer number (8558744544).

Almost surely, 2^29955605897 is an apocalyptic number.

It is an amenable number.

29955605897 is a deficient number, since it is larger than the sum of its proper divisors (4279372279).

29955605897 is an equidigital number, since it uses as much as digits as its factorization.

29955605897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279372278.

The product of its (nonzero) digits is 61236000, while the sum is 65.

The spelling of 29955605897 in words is "twenty-nine billion, nine hundred fifty-five million, six hundred five thousand, eight hundred ninety-seven".