2019037855681 has 16 divisors (see below), whose sum is σ = 2649728424960. Its totient is φ = 1490472236880.

The previous prime is 2019037855657. The next prime is 2019037855733. The reversal of 2019037855681 is 1865587309102.

It is not a de Polignac number, because 2019037855681 - 2¹⁵ = 2019037822913 is a prime.

It is a super-2 number, since 2×2019037855681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2019037855631) 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 15 ways as a sum of consecutive naturals, for example, 690031981 + ... + 690034906.

It is an arithmetic number, because the mean of its divisors is an integer number (165608026560).

Almost surely, 2^{2019037855681} is an apocalyptic number.

It is an amenable number.

2019037855681 is a deficient number, since it is larger than the sum of its proper divisors (630690569279).

2019037855681 is a wasteful number, since it uses less digits than its factorization.

2019037855681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380066924.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 2019037855681 in words is "two trillion, nineteen billion, thirty-seven million, eight hundred fifty-five thousand, six hundred eighty-one".