27755552500 has 60 divisors (see below), whose sum is σ = 65364829684. Its totient is φ = 10248192000.

The previous prime is 27755552497. The next prime is 27755552521. The reversal of 27755552500 is 525555772.

It can be written as a sum of positive squares in 10 ways, for example, as 18472615396 + 9282937104 = 135914^2 + 96348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 394509 + ... + 459508.

Almost surely, 2^27755552500 is an apocalyptic number.

27755552500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27755552500 is an abundant number, since it is smaller than the sum of its proper divisors (37609277184).

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

27755552500 is a wasteful number, since it uses less digits than its factorization.

27755552500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854054 (or 854037 counting only the distinct ones).

The product of its (nonzero) digits is 612500, while the sum is 43.

The spelling of 27755552500 in words is "twenty-seven billion, seven hundred fifty-five million, five hundred fifty-two thousand, five hundred".