81003771000003 has 4 divisors (see below), whose sum is σ = 108005028000008. Its totient is φ = 54002514000000.

The previous prime is 81003770999971. The next prime is 81003771000007. The reversal of 81003771000003 is 30000017730018.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81003771000003 - 2⁵ = 81003770999971 is a prime.

It is a super-2 number, since 2×81003771000003² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81003771000007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13500628499998 + ... + 13500628500003.

It is an arithmetic number, because the mean of its divisors is an integer number (27001257000002).

Almost surely, 2^{81003771000003} is an apocalyptic number.

81003771000003 is a deficient number, since it is larger than the sum of its proper divisors (27001257000005).

81003771000003 is a wasteful number, since it uses less digits than its factorization.

81003771000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27001257000004.

The product of its (nonzero) digits is 3528, while the sum is 30.

The spelling of 81003771000003 in words is "eighty-one trillion, three billion, seven hundred seventy-one million, three", and thus it is an aban number.