818212442840 has 32 divisors (see below), whose sum is σ = 1982591689680. Its totient is φ = 302109209472.

The previous prime is 818212442833. The next prime is 818212442863. The reversal of 818212442840 is 48244212818.

It is a junction number, because it is equal to n+sod(n) for n = 818212442791 and 818212442800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786742214 + ... + 786743253.

Almost surely, 2^818212442840 is an apocalyptic number.

It is an amenable number.

818212442840 is an abundant number, since it is smaller than the sum of its proper divisors (1164379246840).

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

818212442840 is a wasteful number, since it uses less digits than its factorization.

818212442840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573485491 (or 1573485487 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 44.

The spelling of 818212442840 in words is "eight hundred eighteen billion, two hundred twelve million, four hundred forty-two thousand, eight hundred forty".