801775372109 has 2 divisors, whose sum is σ = 801775372110. Its totient is φ = 801775372108.

The previous prime is 801775372091. The next prime is 801775372187. The reversal of 801775372109 is 901273577108.

Together with previous prime (801775372091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595400510884 + 206374861225 = 771622^2 + 454285^2 .

It is a cyclic number.

It is not a de Polignac number, because 801775372109 - 2³² = 797480404813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801775372199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400887686054 + 400887686055.

It is an arithmetic number, because the mean of its divisors is an integer number (400887686055).

Almost surely, 2^801775372109 is an apocalyptic number.

It is an amenable number.

801775372109 is a deficient number, since it is larger than the sum of its proper divisors (1).

801775372109 is an equidigital number, since it uses as much as digits as its factorization.

801775372109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 50.

The spelling of 801775372109 in words is "eight hundred one billion, seven hundred seventy-five million, three hundred seventy-two thousand, one hundred nine".