80940819439 has 2 divisors, whose sum is σ = 80940819440. Its totient is φ = 80940819438.

The previous prime is 80940819409. The next prime is 80940819457. The reversal of 80940819439 is 93491804908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80940819439 - 2⁹ = 80940818927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80940819439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80940819409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40470409719 + 40470409720.

It is an arithmetic number, because the mean of its divisors is an integer number (40470409720).

Almost surely, 2^80940819439 is an apocalyptic number.

80940819439 is a deficient number, since it is larger than the sum of its proper divisors (1).

80940819439 is an equidigital number, since it uses as much as digits as its factorization.

80940819439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 80940819439 in words is "eighty billion, nine hundred forty million, eight hundred nineteen thousand, four hundred thirty-nine".