812615446878 has 32 divisors (see below), whose sum is σ = 1695991447296. Its totient is φ = 259079755968.

The previous prime is 812615446859. The next prime is 812615446891. The reversal of 812615446878 is 878644516218.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2352325 + ... + 2675567.

It is an arithmetic number, because the mean of its divisors is an integer number (52999732728).

Almost surely, 2^812615446878 is an apocalyptic number.

812615446878 is an abundant number, since it is smaller than the sum of its proper divisors (883376000418).

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

812615446878 is a wasteful number, since it uses less digits than its factorization.

812615446878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341488.

The product of its digits is 20643840, while the sum is 60.

The spelling of 812615446878 in words is "eight hundred twelve billion, six hundred fifteen million, four hundred forty-six thousand, eight hundred seventy-eight".