80421281954899 has 2 divisors, whose sum is σ = 80421281954900. Its totient is φ = 80421281954898.

The previous prime is 80421281954833. The next prime is 80421281954903. The reversal of 80421281954899 is 99845918212408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80421281954899 - 2²¹ = 80421279857747 is a prime.

It is not a weakly prime, because it can be changed into another prime (80421281954099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40210640977449 + 40210640977450.

It is an arithmetic number, because the mean of its divisors is an integer number (40210640977450).

Almost surely, 2^{80421281954899} is an apocalyptic number.

80421281954899 is a deficient number, since it is larger than the sum of its proper divisors (1).

80421281954899 is an equidigital number, since it uses as much as digits as its factorization.

80421281954899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119439360, while the sum is 70.

The spelling of 80421281954899 in words is "eighty trillion, four hundred twenty-one billion, two hundred eighty-one million, nine hundred fifty-four thousand, eight hundred ninety-nine".