11556464566655 has 16 divisors (see below), whose sum is σ = 13996443609504. Its totient is φ = 9159450639360.

The previous prime is 11556464566649. The next prime is 11556464566693. The reversal of 11556464566655 is 55666546465511.

It is not a de Polignac number, because 11556464566655 - 2¹⁶ = 11556464501119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11556464566591 and 11556464566600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3031406 + ... + 5683515.

It is an arithmetic number, because the mean of its divisors is an integer number (874777725594).

Almost surely, 2^{11556464566655} is an apocalyptic number.

11556464566655 is a deficient number, since it is larger than the sum of its proper divisors (2439979042849).

11556464566655 is a wasteful number, since it uses less digits than its factorization.

11556464566655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8717386.

The product of its digits is 388800000, while the sum is 65.

The spelling of 11556464566655 in words is "eleven trillion, five hundred fifty-six billion, four hundred sixty-four million, five hundred sixty-six thousand, six hundred fifty-five".