811933327840 has 96 divisors (see below), whose sum is σ = 2003985113760. Its totient is φ = 310469376000.

The previous prime is 811933327837. The next prime is 811933327861. The reversal of 811933327840 is 48723339118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397626 + ... + 1334905.

It is an arithmetic number, because the mean of its divisors is an integer number (20874844935).

Almost surely, 2^811933327840 is an apocalyptic number.

811933327840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

811933327840 is an abundant number, since it is smaller than the sum of its proper divisors (1192051785920).

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

811933327840 is a wasteful number, since it uses less digits than its factorization.

811933327840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732676 (or 1732668 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 811933327840 in words is "eight hundred eleven billion, nine hundred thirty-three million, three hundred twenty-seven thousand, eight hundred forty".