812543267880 has 96 divisors (see below), whose sum is σ = 2641140272160. Its totient is φ = 216647464320.

The previous prime is 812543267863. The next prime is 812543267903. The reversal of 812543267880 is 88762345218.

812543267880 is a `hidden beast` number, since 8 + 1 + 2 + 543 + 26 + 78 + 8 + 0 = 666.

812543267880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2439459 + ... + 2752461.

It is an arithmetic number, because the mean of its divisors is an integer number (27511877835).

Almost surely, 2^812543267880 is an apocalyptic number.

It is an amenable number.

812543267880 is an abundant number, since it is smaller than the sum of its proper divisors (1828597004280).

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

812543267880 is a wasteful number, since it uses less digits than its factorization.

812543267880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320231 (or 320224 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 812543267880 in words is "eight hundred twelve billion, five hundred forty-three million, two hundred sixty-seven thousand, eight hundred eighty".