812186412788 has 12 divisors (see below), whose sum is σ = 1424906391972. Its totient is φ = 405070300800.

The previous prime is 812186412727. The next prime is 812186412853. The reversal of 812186412788 is 887214681218.

It is a happy number.

812186412788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212178154384 + 600008258404 = 460628^2 + 774602^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255724613 + ... + 255727788.

It is an arithmetic number, because the mean of its divisors is an integer number (118742199331).

Almost surely, 2^812186412788 is an apocalyptic number.

It is an amenable number.

812186412788 is a deficient number, since it is larger than the sum of its proper divisors (612719979184).

812186412788 is a wasteful number, since it uses less digits than its factorization.

812186412788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511452802 (or 511452800 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 56.

The spelling of 812186412788 in words is "eight hundred twelve billion, one hundred eighty-six million, four hundred twelve thousand, seven hundred eighty-eight".