12009438117808 has 20 divisors (see below), whose sum is σ = 23300030286448. Its totient is φ = 5996527076160.

The previous prime is 12009438117773. The next prime is 12009438117851. The reversal of 12009438117808 is 80871183490021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511986828 + ... + 512010283.

Almost surely, 2^{12009438117808} is an apocalyptic number.

It is an amenable number.

12009438117808 is a deficient number, since it is larger than the sum of its proper divisors (11290592168640).

12009438117808 is a wasteful number, since it uses less digits than its factorization.

12009438117808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023997852 (or 1023997846 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 52.

The spelling of 12009438117808 in words is "twelve trillion, nine billion, four hundred thirty-eight million, one hundred seventeen thousand, eight hundred eight".