80011881 has 12 divisors (see below), whose sum is σ = 119853552. Its totient is φ = 53341092.

The previous prime is 80011879. The next prime is 80011891. The reversal of 80011881 is 18811008.

It is not a de Polignac number, because 80011881 - 2¹ = 80011879 is a prime.

It is a super-2 number, since 2×80011881² = 12803802202316322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80011861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164391 + ... + 164876.

It is an arithmetic number, because the mean of its divisors is an integer number (9987796).

Almost surely, 2^80011881 is an apocalyptic number.

80011881 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

80011881 is a deficient number, since it is larger than the sum of its proper divisors (39841671).

80011881 is an equidigital number, since it uses as much as digits as its factorization.

80011881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329282 (or 329270 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 80011881 is about 8944.9360534327. The cubic root of 80011881 is about 430.9082676493.

Adding to 80011881 its reverse (18811008), we get a palindrome (98822889).

The spelling of 80011881 in words is "eighty million, eleven thousand, eight hundred eighty-one".