13485853681 has 2 divisors, whose sum is σ = 13485853682. Its totient is φ = 13485853680.

The previous prime is 13485853631. The next prime is 13485853697. The reversal of 13485853681 is 18635858431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9420643600 + 4065210081 = 97060^2 + 63759^2 .

It is a cyclic number.

It is not a de Polignac number, because 13485853681 - 2¹³ = 13485845489 is a prime.

It is a super-2 number, since 2×13485853681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13485853631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6742926840 + 6742926841.

It is an arithmetic number, because the mean of its divisors is an integer number (6742926841).

Almost surely, 2^13485853681 is an apocalyptic number.

It is an amenable number.

13485853681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13485853681 is an equidigital number, since it uses as much as digits as its factorization.

13485853681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 52.

The spelling of 13485853681 in words is "thirteen billion, four hundred eighty-five million, eight hundred fifty-three thousand, six hundred eighty-one".