2019090376809 has 135 divisors (see below), whose sum is σ = 3433106316717. Its totient is φ = 1181659525200.

The previous prime is 2019090376739. The next prime is 2019090376819. The reversal of 2019090376809 is 9086730909102.

The square root of 2019090376809 is 1420947.

It is a perfect power (a square), and thus also a powerful number.

2019090376809 is a `hidden beast` number, since 2 + 0 + 190 + 9 + 0 + 376 + 80 + 9 = 666.

It is not a de Polignac number, because 2019090376809 - 2⁹ = 2019090376297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2019090376819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 4360886112 + ... + 4360886574.

Almost surely, 2^{2019090376809} is an apocalyptic number.

2019090376809 is the 1420947-th square number.

2019090376809 is the 710474-th centered octagonal number.

It is an amenable number.

2019090376809 is a deficient number, since it is larger than the sum of its proper divisors (1414015939908).

2019090376809 is an frugal number, since it uses more digits than its factorization.

2019090376809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 2019090376809 in words is "two trillion, nineteen billion, ninety million, three hundred seventy-six thousand, eight hundred nine".