11611656616555 has 16 divisors (see below), whose sum is σ = 14416903350720. Its totient is φ = 8967489822592.

The previous prime is 11611656616541. The next prime is 11611656616559. The reversal of 11611656616555 is 55561665611611.

It is a cyclic number.

It is not a de Polignac number, because 11611656616555 - 2¹¹ = 11611656614507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11611656616496 and 11611656616505.

It is not an unprimeable number, because it can be changed into a prime (11611656616559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5896144 + ... + 7614973.

It is an arithmetic number, because the mean of its divisors is an integer number (901056459420).

Almost surely, 2^{11611656616555} is an apocalyptic number.

11611656616555 is a deficient number, since it is larger than the sum of its proper divisors (2805246734165).

11611656616555 is a wasteful number, since it uses less digits than its factorization.

11611656616555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13517078.

The product of its digits is 4860000, while the sum is 55.

The spelling of 11611656616555 in words is "eleven trillion, six hundred eleven billion, six hundred fifty-six million, six hundred sixteen thousand, five hundred fifty-five".