80078730073 has 4 divisors (see below), whose sum is σ = 80125920180. Its totient is φ = 80031539968.

The previous prime is 80078730059. The next prime is 80078730077. The reversal of 80078730073 is 37003787008.

It is a happy number.

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 69975062784 + 10103667289 = 264528^2 + 100517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80078730073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80078730077) 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, 23592508 + ... + 23595901.

It is an arithmetic number, because the mean of its divisors is an integer number (20031480045).

Almost surely, 2^80078730073 is an apocalyptic number.

It is an amenable number.

80078730073 is a deficient number, since it is larger than the sum of its proper divisors (47190107).

80078730073 is a wasteful number, since it uses less digits than its factorization.

80078730073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47190106.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 80078730073 in words is "eighty billion, seventy-eight million, seven hundred thirty thousand, seventy-three".