80838051869 has 2 divisors, whose sum is σ = 80838051870. Its totient is φ = 80838051868.

The previous prime is 80838051859. The next prime is 80838051913. The reversal of 80838051869 is 96815083808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54668518969 + 26169532900 = 233813^2 + 161770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80838051869 is a prime.

It is a super-2 number, since 2×80838051869² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80838051859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40419025934 + 40419025935.

It is an arithmetic number, because the mean of its divisors is an integer number (40419025935).

Almost surely, 2^80838051869 is an apocalyptic number.

It is an amenable number.

80838051869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80838051869 is an equidigital number, since it uses as much as digits as its factorization.

80838051869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 80838051869 in words is "eighty billion, eight hundred thirty-eight million, fifty-one thousand, eight hundred sixty-nine".