12117243537 has 12 divisors (see below), whose sum is σ = 20003068800. Its totient is φ = 6924139128.

The previous prime is 12117243533. The next prime is 12117243547. The reversal of 12117243537 is 73534271121.

12117243537 is a `hidden beast` number, since 1 + 2 + 11 + 72 + 43 + 537 = 666.

It is not a de Polignac number, because 12117243537 - 2² = 12117243533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12117243533) 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, 96168537 + ... + 96168662.

It is an arithmetic number, because the mean of its divisors is an integer number (1666922400).

Almost surely, 2^12117243537 is an apocalyptic number.

It is an amenable number.

12117243537 is a deficient number, since it is larger than the sum of its proper divisors (7885825263).

12117243537 is a wasteful number, since it uses less digits than its factorization.

12117243537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192337212 (or 192337209 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The spelling of 12117243537 in words is "twelve billion, one hundred seventeen million, two hundred forty-three thousand, five hundred thirty-seven".