27755220012 has 48 divisors (see below), whose sum is σ = 71227817472. Its totient is φ = 8358361920.

The previous prime is 27755220001. The next prime is 27755220047. The reversal of 27755220012 is 21002255772.

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 15 ways as a sum of consecutive naturals, for example, 1885414 + ... + 1900077.

It is an arithmetic number, because the mean of its divisors is an integer number (1483912864).

Almost surely, 2^27755220012 is an apocalyptic number.

It is an amenable number.

27755220012 is an abundant number, since it is smaller than the sum of its proper divisors (43472597460).

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

27755220012 is a wasteful number, since it uses less digits than its factorization.

27755220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785558 (or 3785556 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

Adding to 27755220012 its reverse (21002255772), we get a palindrome (48757475784).

The spelling of 27755220012 in words is "twenty-seven billion, seven hundred fifty-five million, two hundred twenty thousand, twelve".