81800714100 has 144 divisors (see below), whose sum is σ = 275591611008. Its totient is φ = 18344501760.

The previous prime is 81800714029. The next prime is 81800714113. The reversal of 81800714100 is 141700818.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256179 + ... + 478778.

It is an arithmetic number, because the mean of its divisors is an integer number (1913830632).

Almost surely, 2^81800714100 is an apocalyptic number.

It is an amenable number.

81800714100 is an abundant number, since it is smaller than the sum of its proper divisors (193790896908).

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

81800714100 is a wasteful number, since it uses less digits than its factorization.

81800714100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735034 (or 735027 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The spelling of 81800714100 in words is "eighty-one billion, eight hundred million, seven hundred fourteen thousand, one hundred".