81800743110 has 32 divisors (see below), whose sum is σ = 198345726432. Its totient is φ = 21588648960.

The previous prime is 81800743069. The next prime is 81800743133. The reversal of 81800743110 is 1134700818.

It is a Curzon 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, 14052201 + ... + 14058020.

It is an arithmetic number, because the mean of its divisors is an integer number (6198303951).

Almost surely, 2^81800743110 is an apocalyptic number.

81800743110 is an abundant number, since it is smaller than the sum of its proper divisors (116544983322).

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

81800743110 is a wasteful number, since it uses less digits than its factorization.

81800743110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28110328.

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 81800743110 in words is "eighty-one billion, eight hundred million, seven hundred forty-three thousand, one hundred ten".