818777443242 has 16 divisors (see below), whose sum is σ = 1786423512672. Its totient is φ = 248114376720.

The previous prime is 818777443241. The next prime is 818777443261. The reversal of 818777443242 is 242344777818.

It is not an unprimeable number, because it can be changed into a prime (818777443241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6202859353 + ... + 6202859484.

It is an arithmetic number, because the mean of its divisors is an integer number (111651469542).

Almost surely, 2^818777443242 is an apocalyptic number.

818777443242 is an abundant number, since it is smaller than the sum of its proper divisors (967646069430).

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

818777443242 is a wasteful number, since it uses less digits than its factorization.

818777443242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12405718853.

The product of its digits is 16859136, while the sum is 57.

The spelling of 818777443242 in words is "eight hundred eighteen billion, seven hundred seventy-seven million, four hundred forty-three thousand, two hundred forty-two".