1085126407909 has 2 divisors, whose sum is σ = 1085126407910. Its totient is φ = 1085126407908.

The previous prime is 1085126407891. The next prime is 1085126407973. The reversal of 1085126407909 is 9097046215801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048145964100 + 36980443809 = 1023790^2 + 192303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085126407909 - 2²⁹ = 1084589536997 is a prime.

It is a super-2 number, since 2×1085126407909² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085126404909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542563203954 + 542563203955.

It is an arithmetic number, because the mean of its divisors is an integer number (542563203955).

Almost surely, 2^{1085126407909} is an apocalyptic number.

It is an amenable number.

1085126407909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085126407909 is an equidigital number, since it uses as much as digits as its factorization.

1085126407909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 1085126407909 in words is "one trillion, eighty-five billion, one hundred twenty-six million, four hundred seven thousand, nine hundred nine".