19550005165 has 16 divisors (see below), whose sum is σ = 23710192128. Its totient is φ = 15473327616.

The previous prime is 19550005159. The next prime is 19550005213. The reversal of 19550005165 is 56150005591.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19550005165 - 2³ = 19550005157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1907244 + ... + 1917466.

It is an arithmetic number, because the mean of its divisors is an integer number (1481887008).

Almost surely, 2^19550005165 is an apocalyptic number.

It is an amenable number.

19550005165 is a deficient number, since it is larger than the sum of its proper divisors (4160186963).

19550005165 is a wasteful number, since it uses less digits than its factorization.

19550005165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14268.

The product of its (nonzero) digits is 33750, while the sum is 37.

The spelling of 19550005165 in words is "nineteen billion, five hundred fifty million, five thousand, one hundred sixty-five".