11551565606155 has 16 divisors (see below), whose sum is σ = 14090719610880. Its totient is φ = 9089581464288.

The previous prime is 11551565606143. The next prime is 11551565606177. The reversal of 11551565606155 is 55160656515511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11551565606155 - 2¹¹ = 11551565604107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55493967 + ... + 55701736.

It is an arithmetic number, because the mean of its divisors is an integer number (880669975680).

Almost surely, 2^{11551565606155} is an apocalyptic number.

11551565606155 is a deficient number, since it is larger than the sum of its proper divisors (2539154004725).

11551565606155 is a wasteful number, since it uses less digits than its factorization.

11551565606155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111196050.

The product of its (nonzero) digits is 3375000, while the sum is 52.

The spelling of 11551565606155 in words is "eleven trillion, five hundred fifty-one billion, five hundred sixty-five million, six hundred six thousand, one hundred fifty-five".