13685440264 has 16 divisors (see below), whose sum is σ = 25721157420. Its totient is φ = 6826464960.

The previous prime is 13685440247. The next prime is 13685440267. The reversal of 13685440264 is 46204458631.

It can be written as a sum of positive squares in 2 ways, for example, as 9911795364 + 3773644900 = 99558^2 + 61430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13685440264.

It is not an unprimeable number, because it can be changed into a prime (13685440267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028319 + ... + 2035054.

Almost surely, 2^13685440264 is an apocalyptic number.

It is an amenable number.

13685440264 is a deficient number, since it is larger than the sum of its proper divisors (12035717156).

13685440264 is a wasteful number, since it uses less digits than its factorization.

13685440264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063800 (or 4063796 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 13685440264 its reverse (46204458631), we get a palindrome (59889898895).

The spelling of 13685440264 in words is "thirteen billion, six hundred eighty-five million, four hundred forty thousand, two hundred sixty-four".