811447023109 has 2 divisors, whose sum is σ = 811447023110. Its totient is φ = 811447023108.

The previous prime is 811447023097. The next prime is 811447023193. The reversal of 811447023109 is 901320744118.

811447023109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 599803780900 + 211643242209 = 774470^2 + 460047^2 .

It is a cyclic number.

It is not a de Polignac number, because 811447023109 - 2¹¹ = 811447021061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811447023209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405723511554 + 405723511555.

It is an arithmetic number, because the mean of its divisors is an integer number (405723511555).

Almost surely, 2^811447023109 is an apocalyptic number.

It is an amenable number.

811447023109 is a deficient number, since it is larger than the sum of its proper divisors (1).

811447023109 is an equidigital number, since it uses as much as digits as its factorization.

811447023109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 811447023109 in words is "eight hundred eleven billion, four hundred forty-seven million, twenty-three thousand, one hundred nine".