1311280417085 has 16 divisors (see below), whose sum is σ = 1630399207680. Its totient is φ = 1011786809280.

The previous prime is 1311280417079. The next prime is 1311280417087. The reversal of 1311280417085 is 5807140821131.

It is not a de Polignac number, because 1311280417085 - 2³⁸ = 1036402510141 is a prime.

It is a super-2 number, since 2×1311280417085² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311280417087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41918501 + ... + 41949770.

It is an arithmetic number, because the mean of its divisors is an integer number (101899950480).

Almost surely, 2^{1311280417085} is an apocalyptic number.

It is an amenable number.

1311280417085 is a deficient number, since it is larger than the sum of its proper divisors (319118790595).

1311280417085 is an equidigital number, since it uses as much as digits as its factorization.

1311280417085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83868388.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 1311280417085 in words is "one trillion, three hundred eleven billion, two hundred eighty million, four hundred seventeen thousand, eighty-five".