819231231790 has 16 divisors (see below), whose sum is σ = 1479649042368. Its totient is φ = 326574087136.

The previous prime is 819231231779. The next prime is 819231231821. The reversal of 819231231790 is 97132132918.

It is a super-2 number, since 2×819231231790² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 819231231790.

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, 139797622 + ... + 139803481.

It is an arithmetic number, because the mean of its divisors is an integer number (92478065148).

Almost surely, 2^819231231790 is an apocalyptic number.

819231231790 is a deficient number, since it is larger than the sum of its proper divisors (660417810578).

819231231790 is a wasteful number, since it uses less digits than its factorization.

819231231790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279601403.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 819231231790 in words is "eight hundred nineteen billion, two hundred thirty-one million, two hundred thirty-one thousand, seven hundred ninety".