27755220492 has 72 divisors (see below), whose sum is σ = 71855223440. Its totient is φ = 9028454400.

The previous prime is 27755220487. The next prime is 27755220499. The reversal of 27755220492 is 29402255772.

27755220492 is a `hidden beast` number, since 2 + 7 + 7 + 552 + 2 + 0 + 4 + 92 = 666.

It is not an unprimeable number, because it can be changed into a prime (27755220499) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1851684 + ... + 1866612.

Almost surely, 2^27755220492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27755220492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35927611720).

27755220492 is an abundant number, since it is smaller than the sum of its proper divisors (44100002948).

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

27755220492 is a wasteful number, since it uses less digits than its factorization.

27755220492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16183 (or 16178 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 27755220492 in words is "twenty-seven billion, seven hundred fifty-five million, two hundred twenty thousand, four hundred ninety-two".