619878781812 has 12 divisors (see below), whose sum is σ = 1446383824256. Its totient is φ = 206626260600.

The previous prime is 619878781811. The next prime is 619878781843. The reversal of 619878781812 is 218187878916.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619878781811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25828282564 + ... + 25828282587.

Almost surely, 2^619878781812 is an apocalyptic number.

It is an amenable number.

619878781812 is an abundant number, since it is smaller than the sum of its proper divisors (826505042444).

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

619878781812 is a wasteful number, since it uses less digits than its factorization.

619878781812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51656565158 (or 51656565156 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 66.

The spelling of 619878781812 in words is "six hundred nineteen billion, eight hundred seventy-eight million, seven hundred eighty-one thousand, eight hundred twelve".