1919681823772 has 24 divisors (see below), whose sum is σ = 3369308382720. Its totient is φ = 957022589040.

The previous prime is 1919681823739. The next prime is 1919681823779. The reversal of 1919681823772 is 2773281869191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919681823779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43548679 + ... + 43592737.

It is an arithmetic number, because the mean of its divisors is an integer number (140387849280).

Almost surely, 2^{1919681823772} is an apocalyptic number.

It is an amenable number.

1919681823772 is a deficient number, since it is larger than the sum of its proper divisors (1449626558948).

1919681823772 is a wasteful number, since it uses less digits than its factorization.

1919681823772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75801 (or 75799 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 64.

The spelling of 1919681823772 in words is "one trillion, nine hundred nineteen billion, six hundred eighty-one million, eight hundred twenty-three thousand, seven hundred seventy-two".