81143700093 has 48 divisors (see below), whose sum is σ = 125001991296. Its totient is φ = 50545244160.

The previous prime is 81143700073. The next prime is 81143700133. The reversal of 81143700093 is 39000734118.

It is a happy number.

It is not a de Polignac number, because 81143700093 - 2¹⁰ = 81143699069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81143700073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44315688 + ... + 44317518.

It is an arithmetic number, because the mean of its divisors is an integer number (2604208152).

Almost surely, 2^81143700093 is an apocalyptic number.

It is an amenable number.

81143700093 is a deficient number, since it is larger than the sum of its proper divisors (43858291203).

81143700093 is a wasteful number, since it uses less digits than its factorization.

81143700093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 81143700093 in words is "eighty-one billion, one hundred forty-three million, seven hundred thousand, ninety-three".