27551516550 has 24 divisors (see below), whose sum is σ = 68327761416. Its totient is φ = 7347071040.

The previous prime is 27551516537. The next prime is 27551516579. The reversal of 27551516550 is 5561515572.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91838239 + ... + 91838538.

It is an arithmetic number, because the mean of its divisors is an integer number (2846990059).

Almost surely, 2^27551516550 is an apocalyptic number.

27551516550 is an abundant number, since it is smaller than the sum of its proper divisors (40776244866).

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

27551516550 is a wasteful number, since it uses less digits than its factorization.

27551516550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183676792 (or 183676787 counting only the distinct ones).

The product of its (nonzero) digits is 262500, while the sum is 42.

The spelling of 27551516550 in words is "twenty-seven billion, five hundred fifty-one million, five hundred sixteen thousand, five hundred fifty".