13865537241 has 12 divisors (see below), whose sum is σ = 20029117732. Its totient is φ = 9243174816.

The previous prime is 13865537219. The next prime is 13865537243. The reversal of 13865537241 is 14273556831.

It is a happy number.

13865537241 is a `hidden beast` number, since 1 + 38 + 65 + 537 + 24 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6181261641 + 7684275600 = 78621^2 + 87660^2 .

It is not a de Polignac number, because 13865537241 - 2⁵ = 13865537209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13865537243) 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, 197835 + ... + 258591.

Almost surely, 2^13865537241 is an apocalyptic number.

It is an amenable number.

13865537241 is a deficient number, since it is larger than the sum of its proper divisors (6163580491).

13865537241 is a wasteful number, since it uses less digits than its factorization.

13865537241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86120 (or 86117 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 13865537241 in words is "thirteen billion, eight hundred sixty-five million, five hundred thirty-seven thousand, two hundred forty-one".