80500720045 has 4 divisors (see below), whose sum is σ = 96600864060. Its totient is φ = 64400576032.

The previous prime is 80500720021. The next prime is 80500720063. The reversal of 80500720045 is 54002700508.

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 54906799684 + 25593920361 = 234322^2 + 159981^2 .

It is a cyclic number.

It is not a de Polignac number, because 80500720045 - 2¹⁹ = 80500195757 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 junction number, because it is equal to n+sod(n) for n = 80500719989 and 80500720016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8050072000 + ... + 8050072009.

It is an arithmetic number, because the mean of its divisors is an integer number (24150216015).

Almost surely, 2^80500720045 is an apocalyptic number.

It is an amenable number.

80500720045 is a deficient number, since it is larger than the sum of its proper divisors (16100144015).

80500720045 is a wasteful number, since it uses less digits than its factorization.

80500720045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16100144014.

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 80500720045 in words is "eighty billion, five hundred million, seven hundred twenty thousand, forty-five".