13850697817 has 6 divisors (see below), whose sum is σ = 15224320874. Its totient is φ = 12591543360.

The previous prime is 13850697787. The next prime is 13850697863. The reversal of 13850697817 is 71879605831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13585301136 + 265396681 = 116556^2 + 16291^2 .

It is not a de Polignac number, because 13850697817 - 2¹¹ = 13850695769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13850697877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57234168 + ... + 57234409.

Almost surely, 2^13850697817 is an apocalyptic number.

It is an amenable number.

13850697817 is a deficient number, since it is larger than the sum of its proper divisors (1373623057).

13850697817 is a wasteful number, since it uses less digits than its factorization.

13850697817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114468599 (or 114468588 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 13850697817 in words is "thirteen billion, eight hundred fifty million, six hundred ninety-seven thousand, eight hundred seventeen".