80531816387 has 4 divisors (see below), whose sum is σ = 87852890616. Its totient is φ = 73210742160.

The previous prime is 80531816381. The next prime is 80531816413. The reversal of 80531816387 is 78361813508.

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 80531816387 - 2¹⁰ = 80531815363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80531816381) 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, 3660537098 + ... + 3660537119.

It is an arithmetic number, because the mean of its divisors is an integer number (21963222654).

Almost surely, 2^80531816387 is an apocalyptic number.

80531816387 is a deficient number, since it is larger than the sum of its proper divisors (7321074229).

80531816387 is a wasteful number, since it uses less digits than its factorization.

80531816387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321074228.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 80531816387 in words is "eighty billion, five hundred thirty-one million, eight hundred sixteen thousand, three hundred eighty-seven".