81140803400 has 48 divisors (see below), whose sum is σ = 198581449200. Its totient is φ = 30748092480.

The previous prime is 81140803399. The next prime is 81140803417. The reversal of 81140803400 is 430804118.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10672622 + ... + 10680221.

It is an arithmetic number, because the mean of its divisors is an integer number (4137113525).

Almost surely, 2^81140803400 is an apocalyptic number.

It is an amenable number.

81140803400 is an abundant number, since it is smaller than the sum of its proper divisors (117440645800).

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

81140803400 is a wasteful number, since it uses less digits than its factorization.

81140803400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21352878 (or 21352869 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 81140803400 in words is "eighty-one billion, one hundred forty million, eight hundred three thousand, four hundred".