810123321018 has 24 divisors (see below), whose sum is σ = 1780932261024. Its totient is φ = 245491915240.

The previous prime is 810123320969. The next prime is 810123321023.

810123321018 is nontrivially palindromic in base 10.

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, 557935446 + ... + 557936897.

It is an arithmetic number, because the mean of its divisors is an integer number (74205510876).

Almost surely, 2^810123321018 is an apocalyptic number.

810123321018 is an abundant number, since it is smaller than the sum of its proper divisors (970808940006).

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

810123321018 is a wasteful number, since it uses less digits than its factorization.

810123321018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115872370 (or 1115872359 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 810123321018 in words is "eight hundred ten billion, one hundred twenty-three million, three hundred twenty-one thousand, eighteen".