190055549709 has 6 divisors (see below), whose sum is σ = 274524682926. Its totient is φ = 126703699800.

The previous prime is 190055549699. The next prime is 190055549729. The reversal of 190055549709 is 907945550091.

190055549709 is a `hidden beast` number, since 1 + 90 + 0 + 5 + 5 + 549 + 7 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 189146708100 + 908841609 = 434910^2 + 30147^2 .

It is not a de Polignac number, because 190055549709 - 2⁹ = 190055549197 is a prime.

It is a super-2 number, since 2×190055549709² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190055549729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10558641642 + ... + 10558641659.

It is an arithmetic number, because the mean of its divisors is an integer number (45754113821).

Almost surely, 2^190055549709 is an apocalyptic number.

It is an amenable number.

190055549709 is a deficient number, since it is larger than the sum of its proper divisors (84469133217).

190055549709 is a wasteful number, since it uses less digits than its factorization.

190055549709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21117283307 (or 21117283304 counting only the distinct ones).

The product of its (nonzero) digits is 2551500, while the sum is 54.

The spelling of 190055549709 in words is "one hundred ninety billion, fifty-five million, five hundred forty-nine thousand, seven hundred nine".