1919827138845 has 32 divisors (see below), whose sum is σ = 3829681152000. Its totient is φ = 797850239040.

The previous prime is 1919827138753. The next prime is 1919827138877. The reversal of 1919827138845 is 5488317289191.

It is not a de Polignac number, because 1919827138845 - 2¹⁵ = 1919827106077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 831092845 + ... + 831095154.

It is an arithmetic number, because the mean of its divisors is an integer number (119677536000).

Almost surely, 2^{1919827138845} is an apocalyptic number.

1919827138845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1919827138845 is a deficient number, since it is larger than the sum of its proper divisors (1909854013155).

1919827138845 is a wasteful number, since it uses less digits than its factorization.

1919827138845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662188025.

The product of its digits is 34836480, while the sum is 66.

The spelling of 1919827138845 in words is "one trillion, nine hundred nineteen billion, eight hundred twenty-seven million, one hundred thirty-eight thousand, eight hundred forty-five".