12056616205551 has 6 divisors (see below), whose sum is σ = 17415112296920. Its totient is φ = 8037744137028.

The previous prime is 12056616205499. The next prime is 12056616205561. The reversal of 12056616205551 is 15550261665021.

It is a happy number.

12056616205551 is a `hidden beast` number, since 1 + 2 + 0 + 5 + 6 + 616 + 20 + 5 + 5 + 5 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12056616205551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12056616205497 and 12056616205506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12056616205561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669812011411 + ... + 669812011428.

Almost surely, 2^{12056616205551} is an apocalyptic number.

12056616205551 is a deficient number, since it is larger than the sum of its proper divisors (5358496091369).

12056616205551 is a wasteful number, since it uses less digits than its factorization.

12056616205551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339624022845 (or 1339624022842 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 12056616205551 in words is "twelve trillion, fifty-six billion, six hundred sixteen million, two hundred five thousand, five hundred fifty-one".