1909165968 has 60 divisors (see below), whose sum is σ = 5575327680. Its totient is φ = 608718528.

The previous prime is 1909165939. The next prime is 1909166023. The reversal of 1909165968 is 8695619091.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284908 + ... + 291531.

It is an arithmetic number, because the mean of its divisors is an integer number (92922128).

Almost surely, 2^1909165968 is an apocalyptic number.

1909165968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1909165968 is an abundant number, since it is smaller than the sum of its proper divisors (3666161712).

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

1909165968 is a wasteful number, since it uses less digits than its factorization.

1909165968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576476 (or 576467 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 1909165968 is about 43694.0037991485. The cubic root of 1909165968 is about 1240.5508236126.

The spelling of 1909165968 in words is "one billion, nine hundred nine million, one hundred sixty-five thousand, nine hundred sixty-eight".