12158556739688 has 8 divisors (see below), whose sum is σ = 22797293886930. Its totient is φ = 6079278369840.

The previous prime is 12158556739657. The next prime is 12158556739709. The reversal of 12158556739688 is 88693765585121.

It can be written as a sum of positive squares in only one way, i.e., 11753528868964 + 405027870724 = 3428342^2 + 636418^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759909796223 + ... + 759909796238.

Almost surely, 2^{12158556739688} is an apocalyptic number.

It is an amenable number.

12158556739688 is a deficient number, since it is larger than the sum of its proper divisors (10638737147242).

12158556739688 is a wasteful number, since it uses less digits than its factorization.

12158556739688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519819592467 (or 1519819592463 counting only the distinct ones).

The product of its digits is 870912000, while the sum is 74.

The spelling of 12158556739688 in words is "twelve trillion, one hundred fifty-eight billion, five hundred fifty-six million, seven hundred thirty-nine thousand, six hundred eighty-eight".