13436447085 has 12 divisors (see below), whose sum is σ = 23289841692. Its totient is φ = 7166105088.

The previous prime is 13436447083. The next prime is 13436447107. The reversal of 13436447085 is 58074463431.

13436447085 is a `hidden beast` number, since 1 + 3 + 43 + 64 + 470 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2316111876 + 11120335209 = 48126^2 + 105453^2 .

It is not a de Polignac number, because 13436447085 - 2¹ = 13436447083 is a prime.

It is a super-2 number, since 2×13436447085² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 298587713 = 13436447085 / (1 + 3 + 4 + 3 + 6 + 4 + 4 + 7 + 0 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 13436447085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13436447083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149293812 + ... + 149293901.

It is an arithmetic number, because the mean of its divisors is an integer number (1940820141).

Almost surely, 2^13436447085 is an apocalyptic number.

13436447085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13436447085 is a deficient number, since it is larger than the sum of its proper divisors (9853394607).

13436447085 is a wasteful number, since it uses less digits than its factorization.

13436447085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298587724 (or 298587721 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 13436447085 in words is "thirteen billion, four hundred thirty-six million, four hundred forty-seven thousand, eighty-five".