80010000081 has 48 divisors (see below), whose sum is σ = 133531901568. Its totient is φ = 45625075200.

The previous prime is 80010000071. The next prime is 80010000089. The reversal of 80010000081 is 18000001008.

It is a happy number.

It is not a de Polignac number, because 80010000081 - 2⁹ = 80009999569 is a prime.

It is a super-2 number, since 2×80010000081² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80010000089) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9792660 + ... + 9800826.

It is an arithmetic number, because the mean of its divisors is an integer number (2781914616).

Almost surely, 2^80010000081 is an apocalyptic number.

It is an amenable number.

80010000081 is a deficient number, since it is larger than the sum of its proper divisors (53521901487).

80010000081 is a wasteful number, since it uses less digits than its factorization.

80010000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022 (or 14019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 80010000081 its reverse (18000001008), we get a palindrome (98010001089).

The spelling of 80010000081 in words is "eighty billion, ten million, eighty-one", and thus it is an aban number and an uban number.