80045491 has 4 divisors (see below), whose sum is σ = 80303184. Its totient is φ = 79787800.

The previous prime is 80045473. The next prime is 80045501. The reversal of 80045491 is 19454008.

It is a happy number.

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 80045491 - 2¹³ = 80037299 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80045591) 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, 128380 + ... + 129001.

It is an arithmetic number, because the mean of its divisors is an integer number (20075796).

Almost surely, 2^80045491 is an apocalyptic number.

80045491 is a deficient number, since it is larger than the sum of its proper divisors (257693).

80045491 is a wasteful number, since it uses less digits than its factorization.

80045491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257692.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 80045491 is about 8946.8145727963. The cubic root of 80045491 is about 430.9685953543.

Adding to 80045491 its reverse (19454008), we get a palindrome (99499499).

The spelling of 80045491 in words is "eighty million, forty-five thousand, four hundred ninety-one".