29991105606 has 64 divisors (see below), whose sum is σ = 74908141056. Its totient is φ = 7776864000.

The previous prime is 29991105583. The next prime is 29991105607. The reversal of 29991105606 is 60650119992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29991105607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223656 + ... + 331668.

It is an arithmetic number, because the mean of its divisors is an integer number (1170439704).

Almost surely, 2^29991105606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29991105606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37454070528).

29991105606 is an abundant number, since it is smaller than the sum of its proper divisors (44917035450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29991105606 is a wasteful number, since it uses less digits than its factorization.

29991105606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108637.

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 29991105606 in words is "twenty-nine billion, nine hundred ninety-one million, one hundred five thousand, six hundred six".