80981159 has 4 divisors (see below), whose sum is σ = 92549904. Its totient is φ = 69412416.

The previous prime is 80981143. The next prime is 80981209. The reversal of 80981159 is 95118908.

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

It is a cyclic number.

It is not a de Polignac number, because 80981159 - 2⁴ = 80981143 is a prime.

It is a super-2 number, since 2×80981159² = 13115896225966562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80981759) 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, 5784362 + ... + 5784375.

It is an arithmetic number, because the mean of its divisors is an integer number (23137476).

Almost surely, 2^80981159 is an apocalyptic number.

80981159 is a deficient number, since it is larger than the sum of its proper divisors (11568745).

80981159 is a wasteful number, since it uses less digits than its factorization.

80981159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11568744.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 80981159 is about 8998.9532169025. The cubic root of 80981159 is about 432.6413210536.

The spelling of 80981159 in words is "eighty million, nine hundred eighty-one thousand, one hundred fifty-nine".