81000027000003 has 32 divisors (see below), whose sum is σ = 111822841225216. Its totient is φ = 52112627659008.

The previous prime is 81000027000001. The next prime is 81000027000037. The reversal of 81000027000003 is 30000072000018.

It is not a de Polignac number, because 81000027000003 - 2¹ = 81000027000001 is a prime.

It is a super-2 number, since 2×81000027000003² (a number of 29 digits) contains 22 as substring.

It is the 9000002-nd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81000027000001) by changing a digit.

It is a nontrivial repunit in base 9000001.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50996100 + ... + 52560462.

It is an arithmetic number, because the mean of its divisors is an integer number (3494463788288).

Almost surely, 2^{81000027000003} is an apocalyptic number.

81000027000003 is a deficient number, since it is larger than the sum of its proper divisors (30822814225213).

81000027000003 is a wasteful number, since it uses less digits than its factorization.

81000027000003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568203.

The product of its (nonzero) digits is 336, while the sum is 21.

The spelling of 81000027000003 in words is "eighty-one trillion, twenty-seven million, three", and thus it is an aban number and an uban number.