818321911428 has 72 divisors (see below), whose sum is σ = 2230453411200. Its totient is φ = 232827951552.

The previous prime is 818321911411. The next prime is 818321911487. The reversal of 818321911428 is 824119123818.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2770983 + ... + 3052046.

It is an arithmetic number, because the mean of its divisors is an integer number (30978519600).

Almost surely, 2^818321911428 is an apocalyptic number.

It is an amenable number.

818321911428 is an abundant number, since it is smaller than the sum of its proper divisors (1412131499772).

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

818321911428 is a wasteful number, since it uses less digits than its factorization.

818321911428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823289 (or 5823280 counting only the distinct ones).

The product of its digits is 221184, while the sum is 48.

The spelling of 818321911428 in words is "eight hundred eighteen billion, three hundred twenty-one million, nine hundred eleven thousand, four hundred twenty-eight".