11551055166 has 32 divisors (see below), whose sum is σ = 29336014080. Its totient is φ = 3300301368.

The previous prime is 11551055143. The next prime is 11551055189. The reversal of 11551055166 is 66155015511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11551055143) and next prime (11551055189).

It is a self number, because there is not a number n which added to its sum of digits gives 11551055166.

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, 15278796 + ... + 15279551.

It is an arithmetic number, because the mean of its divisors is an integer number (916750440).

Almost surely, 2^11551055166 is an apocalyptic number.

11551055166 is an abundant number, since it is smaller than the sum of its proper divisors (17784958914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11551055166 is a wasteful number, since it uses less digits than its factorization.

11551055166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30558365 (or 30558359 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

It can be divided in two parts, 11551055 and 166, that added together give a triangular number (11551221 = T₄₈₀₆).

The spelling of 11551055166 in words is "eleven billion, five hundred fifty-one million, fifty-five thousand, one hundred sixty-six".