201661105044 has 72 divisors (see below), whose sum is σ = 553960759968. Its totient is φ = 56923258560.

The previous prime is 201661104949. The next prime is 201661105073. The reversal of 201661105044 is 440501166102.

201661105044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2017227 + ... + 2114834.

It is an arithmetic number, because the mean of its divisors is an integer number (7693899444).

Almost surely, 2^201661105044 is an apocalyptic number.

It is an amenable number.

201661105044 is an abundant number, since it is smaller than the sum of its proper divisors (352299654924).

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

201661105044 is a wasteful number, since it uses less digits than its factorization.

201661105044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132165 (or 4132156 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 201661105044 in words is "two hundred one billion, six hundred sixty-one million, one hundred five thousand, forty-four".