81055003203 has 12 divisors (see below), whose sum is σ = 117167695008. Its totient is φ = 53995939920.

The previous prime is 81055003193. The next prime is 81055003291. The reversal of 81055003203 is 30230055018.

81055003203 is a `hidden beast` number, since 81 + 0 + 550 + 0 + 32 + 0 + 3 = 666.

It is not a de Polignac number, because 81055003203 - 2⁴ = 81055003187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81055053203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3381468 + ... + 3405353.

It is an arithmetic number, because the mean of its divisors is an integer number (9763974584).

Almost surely, 2^81055003203 is an apocalyptic number.

81055003203 is a deficient number, since it is larger than the sum of its proper divisors (36112691805).

81055003203 is a wasteful number, since it uses less digits than its factorization.

81055003203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6788154 (or 6788151 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 81055003203 in words is "eighty-one billion, fifty-five million, three thousand, two hundred three".