81474006800 has 30 divisors (see below), whose sum is σ = 195741302298. Its totient is φ = 32589602560.

The previous prime is 81474006787. The next prime is 81474006847. The reversal of 81474006800 is 860047418.

It can be written as a sum of positive squares in 3 ways, for example, as 27783555856 + 53690450944 = 166684^2 + 231712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101842109 + ... + 101842908.

Almost surely, 2^81474006800 is an apocalyptic number.

81474006800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81474006800 is an abundant number, since it is smaller than the sum of its proper divisors (114267295498).

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

81474006800 is a wasteful number, since it uses less digits than its factorization.

81474006800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203685035 (or 203685024 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 81474006800 in words is "eighty-one billion, four hundred seventy-four million, six thousand, eight hundred".