811815886112 has 48 divisors (see below), whose sum is σ = 1992638999232. Its totient is φ = 316291902720.

The previous prime is 811815886109. The next prime is 811815886187. The reversal of 811815886112 is 211688518118.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164732903 + ... + 164737830.

It is an arithmetic number, because the mean of its divisors is an integer number (41513312484).

Almost surely, 2^811815886112 is an apocalyptic number.

It is an amenable number.

811815886112 is an abundant number, since it is smaller than the sum of its proper divisors (1180823113120).

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

811815886112 is a wasteful number, since it uses less digits than its factorization.

811815886112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329470761 (or 329470753 counting only the distinct ones).

The product of its digits is 245760, while the sum is 50.

The spelling of 811815886112 in words is "eight hundred eleven billion, eight hundred fifteen million, eight hundred eighty-six thousand, one hundred twelve".