80855455789 has 2 divisors, whose sum is σ = 80855455790. Its totient is φ = 80855455788.

The previous prime is 80855455781. The next prime is 80855455817. The reversal of 80855455789 is 98755455808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63735041764 + 17120414025 = 252458^2 + 130845^2 .

It is a cyclic number.

It is not a de Polignac number, because 80855455789 - 2³ = 80855455781 is a prime.

It is a super-2 number, since 2×80855455789² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80855455789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80855455781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40427727894 + 40427727895.

It is an arithmetic number, because the mean of its divisors is an integer number (40427727895).

Almost surely, 2^80855455789 is an apocalyptic number.

It is an amenable number.

80855455789 is a deficient number, since it is larger than the sum of its proper divisors (1).

80855455789 is an equidigital number, since it uses as much as digits as its factorization.

80855455789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640000, while the sum is 64.

The spelling of 80855455789 in words is "eighty billion, eight hundred fifty-five million, four hundred fifty-five thousand, seven hundred eighty-nine".