1085126407891 has 2 divisors, whose sum is σ = 1085126407892. Its totient is φ = 1085126407890.

The previous prime is 1085126407793. The next prime is 1085126407909. The reversal of 1085126407891 is 1987046215801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1085126407891 - 2²³ = 1085118019283 is a prime.

It is a super-2 number, since 2×1085126407891² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1085126407691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542563203945 + 542563203946.

It is an arithmetic number, because the mean of its divisors is an integer number (542563203946).

Almost surely, 2^{1085126407891} is an apocalyptic number.

1085126407891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085126407891 is an equidigital number, since it uses as much as digits as its factorization.

1085126407891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 1085126407891 in words is "one trillion, eighty-five billion, one hundred twenty-six million, four hundred seven thousand, eight hundred ninety-one".