80551516499 has 2 divisors, whose sum is σ = 80551516500. Its totient is φ = 80551516498.

The previous prime is 80551516427. The next prime is 80551516537. The reversal of 80551516499 is 99461515508.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80551516499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80551516499.

It is not a weakly prime, because it can be changed into another prime (80551516399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40275758249 + 40275758250.

It is an arithmetic number, because the mean of its divisors is an integer number (40275758250).

Almost surely, 2^80551516499 is an apocalyptic number.

80551516499 is a deficient number, since it is larger than the sum of its proper divisors (1).

80551516499 is an equidigital number, since it uses as much as digits as its factorization.

80551516499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 80551516499 in words is "eighty billion, five hundred fifty-one million, five hundred sixteen thousand, four hundred ninety-nine".