1819899858368 has 56 divisors (see below), whose sum is σ = 3811466697600. Its totient is φ = 859783051008.

The previous prime is 1819899858347. The next prime is 1819899858419. The reversal of 1819899858368 is 8638589989181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513580 + ... + 2435307.

Almost surely, 2^{1819899858368} is an apocalyptic number.

It is an amenable number.

1819899858368 is an abundant number, since it is smaller than the sum of its proper divisors (1991566839232).

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

1819899858368 is a wasteful number, since it uses less digits than its factorization.

1819899858368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949297 (or 3949287 counting only the distinct ones).

The product of its digits is 2149908480, while the sum is 83.

The spelling of 1819899858368 in words is "one trillion, eight hundred nineteen billion, eight hundred ninety-nine million, eight hundred fifty-eight thousand, three hundred sixty-eight".