80081643 has 4 divisors (see below), whose sum is σ = 106775528. Its totient is φ = 53387760.

The previous prime is 80081633. The next prime is 80081663. The reversal of 80081643 is 34618008.

It is a happy number.

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

It is not a de Polignac number, because 80081643 - 2⁸ = 80081387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80081643.

It is not an unprimeable number, because it can be changed into a prime (80081623) 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, 13346938 + ... + 13346943.

It is an arithmetic number, because the mean of its divisors is an integer number (26693882).

Almost surely, 2^80081643 is an apocalyptic number.

80081643 is a deficient number, since it is larger than the sum of its proper divisors (26693885).

80081643 is a wasteful number, since it uses less digits than its factorization.

80081643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26693884.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 80081643 is about 8948.8347286113. The cubic root of 80081643 is about 431.0334669311.

The spelling of 80081643 in words is "eighty million, eighty-one thousand, six hundred forty-three".