81411041800 has 48 divisors (see below), whose sum is σ = 206488011600. Its totient is φ = 29604014400.

The previous prime is 81411041773. The next prime is 81411041801. The reversal of 81411041800 is 814011418.

It is a super-2 number, since 2×81411041800² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81411041801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18500310 + ... + 18504709.

It is an arithmetic number, because the mean of its divisors is an integer number (4301833575).

Almost surely, 2^81411041800 is an apocalyptic number.

It is an amenable number.

81411041800 is an abundant number, since it is smaller than the sum of its proper divisors (125076969800).

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

81411041800 is a wasteful number, since it uses less digits than its factorization.

81411041800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37005046 (or 37005037 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The spelling of 81411041800 in words is "eighty-one billion, four hundred eleven million, forty-one thousand, eight hundred".