13857502165 has 32 divisors (see below), whose sum is σ = 18362979936. Its totient is φ = 9975813120.

The previous prime is 13857502163. The next prime is 13857502193. The reversal of 13857502165 is 56120575831.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 7486748676 + 6370753489 = 86526^2 + 79817^2 .

It is not a de Polignac number, because 13857502165 - 2¹ = 13857502163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857502163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528055 + ... + 553675.

It is an arithmetic number, because the mean of its divisors is an integer number (573843123).

Almost surely, 2^13857502165 is an apocalyptic number.

It is an amenable number.

13857502165 is a deficient number, since it is larger than the sum of its proper divisors (4505477771).

13857502165 is a wasteful number, since it uses less digits than its factorization.

13857502165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25849.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 13857502165 in words is "thirteen billion, eight hundred fifty-seven million, five hundred two thousand, one hundred sixty-five".