812612827278 has 48 divisors (see below), whose sum is σ = 2012429948256. Its totient is φ = 232146731520.

The previous prime is 812612827199. The next prime is 812612827303. The reversal of 812612827278 is 872728216218.

812612827278 is a `hidden beast` number, since 8 + 12 + 612 + 8 + 2 + 7 + 2 + 7 + 8 = 666.

It is a congruent number.

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, 652618 + ... + 1432178.

It is an arithmetic number, because the mean of its divisors is an integer number (41925623922).

Almost surely, 2^812612827278 is an apocalyptic number.

812612827278 is an abundant number, since it is smaller than the sum of its proper divisors (1199817120978).

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

812612827278 is a wasteful number, since it uses less digits than its factorization.

812612827278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787849 (or 787846 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The spelling of 812612827278 in words is "eight hundred twelve billion, six hundred twelve million, eight hundred twenty-seven thousand, two hundred seventy-eight".