29991855041 has 4 divisors (see below), whose sum is σ = 29992234800. Its totient is φ = 29991475284.

The previous prime is 29991855037. The next prime is 29991855067. The reversal of 29991855041 is 14055819992.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 29991855041 - 2² = 29991855037 is a prime.

It is a super-2 number, since 2×29991855041² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29991855001) 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, 21851 + ... + 245888.

It is an arithmetic number, because the mean of its divisors is an integer number (7498058700).

Almost surely, 2^29991855041 is an apocalyptic number.

It is an amenable number.

29991855041 is a deficient number, since it is larger than the sum of its proper divisors (379759).

29991855041 is a wasteful number, since it uses less digits than its factorization.

29991855041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379758.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The spelling of 29991855041 in words is "twenty-nine billion, nine hundred ninety-one million, eight hundred fifty-five thousand, forty-one".