819683881920 has 84 divisors (see below), whose sum is σ = 2819371028760. Its totient is φ = 218582367744.

The previous prime is 819683881903. The next prime is 819683881967. The reversal of 819683881920 is 29188386918.

It is a happy number.

819683881920 is a `hidden beast` number, since 8 + 1 + 9 + 68 + 388 + 192 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142303350 + ... + 142309109.

Almost surely, 2^819683881920 is an apocalyptic number.

819683881920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

819683881920 is an abundant number, since it is smaller than the sum of its proper divisors (1999687146840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819683881920 is a wasteful number, since it uses less digits than its factorization.

819683881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284612482 (or 284612469 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 819683881920 in words is "eight hundred nineteen billion, six hundred eighty-three million, eight hundred eighty-one thousand, nine hundred twenty".