13865537240 has 32 divisors (see below), whose sum is σ = 31235999760. Its totient is φ = 5539363200.

The previous prime is 13865537219. The next prime is 13865537243. The reversal of 13865537240 is 4273556831.

It is a junction number, because it is equal to n+sod(n) for n = 13865537191 and 13865537200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13865537243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181271 + ... + 246150.

Almost surely, 2^13865537240 is an apocalyptic number.

13865537240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13865537240 is an abundant number, since it is smaller than the sum of its proper divisors (17370462520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13865537240 is a wasteful number, since it uses less digits than its factorization.

13865537240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428243 (or 428239 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 13865537240 in words is "thirteen billion, eight hundred sixty-five million, five hundred thirty-seven thousand, two hundred forty".