12566155749996 has 12 divisors (see below), whose sum is σ = 29321030083352. Its totient is φ = 4188718583328.

The previous prime is 12566155749977. The next prime is 12566155750003. The reversal of 12566155749996 is 69994755166521.

It is a tau number, because it is divible by the number of its divisors (12).

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, 523589822905 + ... + 523589822928.

Almost surely, 2^{12566155749996} is an apocalyptic number.

It is an amenable number.

12566155749996 is an abundant number, since it is smaller than the sum of its proper divisors (16754874333356).

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

12566155749996 is a wasteful number, since it uses less digits than its factorization.

12566155749996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047179645840 (or 1047179645838 counting only the distinct ones).

The product of its digits is 1102248000, while the sum is 75.

The spelling of 12566155749996 in words is "twelve trillion, five hundred sixty-six billion, one hundred fifty-five million, seven hundred forty-nine thousand, nine hundred ninety-six".