27550277550 has 48 divisors (see below), whose sum is σ = 75916324080. Its totient is φ = 7346740320.

The previous prime is 27550277539. The next prime is 27550277597. The reversal of 27550277550 is 5577205572.

27550277550 is a `hidden beast` number, since 2 + 7 + 550 + 27 + 75 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 27550277496 and 27550277505.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10202457 + ... + 10205156.

It is an arithmetic number, because the mean of its divisors is an integer number (1581590085).

Almost surely, 2^27550277550 is an apocalyptic number.

27550277550 is an abundant number, since it is smaller than the sum of its proper divisors (48366046530).

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

27550277550 is a wasteful number, since it uses less digits than its factorization.

27550277550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407634 (or 20407623 counting only the distinct ones).

The product of its (nonzero) digits is 857500, while the sum is 45.

The spelling of 27550277550 in words is "twenty-seven billion, five hundred fifty million, two hundred seventy-seven thousand, five hundred fifty".