27755525550 has 24 divisors (see below), whose sum is σ = 68833703736. Its totient is φ = 7401473440.

The previous prime is 27755525537. The next prime is 27755525557. The reversal of 27755525550 is 5552555772.

It is a self number, because there is not a number n which added to its sum of digits gives 27755525550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27755525557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92518269 + ... + 92518568.

It is an arithmetic number, because the mean of its divisors is an integer number (2868070989).

Almost surely, 2^27755525550 is an apocalyptic number.

27755525550 is an abundant number, since it is smaller than the sum of its proper divisors (41078178186).

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

27755525550 is a wasteful number, since it uses less digits than its factorization.

27755525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185036852 (or 185036847 counting only the distinct ones).

The product of its (nonzero) digits is 3062500, while the sum is 48.

The spelling of 27755525550 in words is "twenty-seven billion, seven hundred fifty-five million, five hundred twenty-five thousand, five hundred fifty".