27229747806 has 20 divisors (see below), whose sum is σ = 61014805632. Its totient is φ = 9076582548.

The previous prime is 27229747789. The next prime is 27229747819. The reversal of 27229747806 is 60874792272.

It is a happy number.

27229747806 is a `hidden beast` number, since 272 + 297 + 4 + 7 + 80 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84042270 + ... + 84042593.

Almost surely, 2^27229747806 is an apocalyptic number.

27229747806 is an abundant number, since it is smaller than the sum of its proper divisors (33785057826).

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

27229747806 is a wasteful number, since it uses less digits than its factorization.

27229747806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168084877 (or 168084868 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 27229747806 in words is "twenty-seven billion, two hundred twenty-nine million, seven hundred forty-seven thousand, eight hundred six".