80745481 has 4 divisors (see below), whose sum is σ = 80846100. Its totient is φ = 80644864.

The previous prime is 80745463. The next prime is 80745487. The reversal of 80745481 is 18454708.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43033600 + 37711881 = 6560^2 + 6141^2 .

It is a cyclic number.

It is not a de Polignac number, because 80745481 - 2⁹ = 80744969 is a prime.

It is a super-2 number, since 2×80745481² = 13039665403842722, which contains 22 as substring.

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 80745481.

It is not an unprimeable number, because it can be changed into a prime (80745487) 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, 49096 + ... + 50713.

It is an arithmetic number, because the mean of its divisors is an integer number (20211525).

Almost surely, 2^80745481 is an apocalyptic number.

It is an amenable number.

80745481 is a deficient number, since it is larger than the sum of its proper divisors (100619).

80745481 is an equidigital number, since it uses as much as digits as its factorization.

80745481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100618.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 80745481 is about 8985.8489304016. The cubic root of 80745481 is about 432.2212105099.

The spelling of 80745481 in words is "eighty million, seven hundred forty-five thousand, four hundred eighty-one".