819220068764 has 12 divisors (see below), whose sum is σ = 1433662243944. Its totient is φ = 409602284784.

The previous prime is 819220068739. The next prime is 819220068769. The reversal of 819220068764 is 467860022918.

It is a super-2 number, since 2×819220068764² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819220068769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696214 + ... + 2124989.

It is an arithmetic number, because the mean of its divisors is an integer number (119471853662).

Almost surely, 2^819220068764 is an apocalyptic number.

It is an amenable number.

819220068764 is a deficient number, since it is larger than the sum of its proper divisors (614442175180).

819220068764 is a wasteful number, since it uses less digits than its factorization.

819220068764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874804 (or 3874802 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 819220068764 in words is "eight hundred nineteen billion, two hundred twenty million, sixty-eight thousand, seven hundred sixty-four".