27555505550 has 24 divisors (see below), whose sum is σ = 51390683256. Its totient is φ = 10992644640.

The previous prime is 27555505519. The next prime is 27555505559. The reversal of 27555505550 is 5550555572.

It is a super-2 number, since 2×27555505550² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27555505559) 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, 720104 + ... + 757403.

It is an arithmetic number, because the mean of its divisors is an integer number (2141278469).

Almost surely, 2^27555505550 is an apocalyptic number.

27555505550 is a deficient number, since it is larger than the sum of its proper divisors (23835177706).

27555505550 is a wasteful number, since it uses less digits than its factorization.

27555505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477892 (or 1477887 counting only the distinct ones).

The product of its (nonzero) digits is 1093750, while the sum is 44.

The spelling of 27555505550 in words is "twenty-seven billion, five hundred fifty-five million, five hundred five thousand, five hundred fifty".