80781081 has 8 divisors (see below), whose sum is σ = 108192000. Its totient is φ = 53612112.

The previous prime is 80781067. The next prime is 80781121. The reversal of 80781081 is 18018708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80781081 - 2¹⁰ = 80780057 is a prime.

It is a super-2 number, since 2×80781081² = 13051166095057122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (80781061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59706 + ... + 61043.

It is an arithmetic number, because the mean of its divisors is an integer number (13524000).

Almost surely, 2^80781081 is an apocalyptic number.

It is an amenable number.

80781081 is a deficient number, since it is larger than the sum of its proper divisors (27410919).

80781081 is a wasteful number, since it uses less digits than its factorization.

80781081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120975.

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 80781081 is about 8987.8296045263. The cubic root of 80781081 is about 432.2847220696.

Adding to 80781081 its reverse (18018708), we get a palindrome (98799789).

The spelling of 80781081 in words is "eighty million, seven hundred eighty-one thousand, eighty-one".