11550043255551 has 16 divisors (see below), whose sum is σ = 15495194954496. Its totient is φ = 7652464212096.

The previous prime is 11550043255529. The next prime is 11550043255559. The reversal of 11550043255551 is 15555234005511.

It is not a de Polignac number, because 11550043255551 - 2²² = 11550039061247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550043255559) by changing a digit.

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, 11301486 + ... + 12281028.

It is an arithmetic number, because the mean of its divisors is an integer number (968449684656).

Almost surely, 2^{11550043255551} is an apocalyptic number.

11550043255551 is a deficient number, since it is larger than the sum of its proper divisors (3945151698945).

11550043255551 is a wasteful number, since it uses less digits than its factorization.

11550043255551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003822.

The product of its (nonzero) digits is 375000, while the sum is 42.

The spelling of 11550043255551 in words is "eleven trillion, five hundred fifty billion, forty-three million, two hundred fifty-five thousand, five hundred fifty-one".