80731638019 has 2 divisors, whose sum is σ = 80731638020. Its totient is φ = 80731638018.

The previous prime is 80731638017. The next prime is 80731638047. The reversal of 80731638019 is 91083613708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80731638019 - 2¹ = 80731638017 is a prime.

It is a super-2 number, since 2×80731638019² (a number of 23 digits) contains 22 as substring.

Together with 80731638017, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 80731638019.

It is not a weakly prime, because it can be changed into another prime (80731638017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40365819009 + 40365819010.

It is an arithmetic number, because the mean of its divisors is an integer number (40365819010).

Almost surely, 2^80731638019 is an apocalyptic number.

80731638019 is a deficient number, since it is larger than the sum of its proper divisors (1).

80731638019 is an equidigital number, since it uses as much as digits as its factorization.

80731638019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 80731638019 in words is "eighty billion, seven hundred thirty-one million, six hundred thirty-eight thousand, nineteen".