1909085166 has 16 divisors (see below), whose sum is σ = 4242411600. Its totient is φ = 636361704.

The previous prime is 1909085149. The next prime is 1909085197. The reversal of 1909085166 is 6615809091.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17676661 + ... + 17676768.

It is an arithmetic number, because the mean of its divisors is an integer number (265150725).

Almost surely, 2^1909085166 is an apocalyptic number.

1909085166 is an abundant number, since it is smaller than the sum of its proper divisors (2333326434).

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

1909085166 is a wasteful number, since it uses less digits than its factorization.

1909085166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35353440 (or 35353434 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1909085166 is about 43693.0791544840. The cubic root of 1909085166 is about 1240.5333220083.

The spelling of 1909085166 in words is "one billion, nine hundred nine million, eighty-five thousand, one hundred sixty-six".