1909225116 has 18 divisors (see below), whose sum is σ = 4826096912. Its totient is φ = 636408360.

The previous prime is 1909225111. The next prime is 1909225133. The reversal of 1909225116 is 6115229091.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 53034031 = 1909225116 / (1 + 9 + 0 + 9 + 2 + 2 + 5 + 1 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909225111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26516980 + ... + 26517051.

Almost surely, 2^1909225116 is an apocalyptic number.

It is an amenable number.

1909225116 is an abundant number, since it is smaller than the sum of its proper divisors (2916871796).

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

1909225116 is a wasteful number, since it uses less digits than its factorization.

1909225116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53034041 (or 53034036 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1909225116 is about 43694.6806373499. The cubic root of 1909225116 is about 1240.5636346766.

The spelling of 1909225116 in words is "one billion, nine hundred nine million, two hundred twenty-five thousand, one hundred sixteen".