80780780803 has 4 divisors (see below), whose sum is σ = 84292988688. Its totient is φ = 77268572920.

The previous prime is 80780780789. The next prime is 80780780807. The reversal of 80780780803 is 30808708708.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80780780803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80780780807) 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, 1756103908 + ... + 1756103953.

It is an arithmetic number, because the mean of its divisors is an integer number (21073247172).

Almost surely, 2^80780780803 is an apocalyptic number.

80780780803 is a deficient number, since it is larger than the sum of its proper divisors (3512207885).

80780780803 is a wasteful number, since it uses less digits than its factorization.

80780780803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512207884.

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 80780780803 in words is "eighty billion, seven hundred eighty million, seven hundred eighty thousand, eight hundred three".