27726640008 has 64 divisors (see below), whose sum is σ = 73414978560. Its totient is φ = 8696073216.

The previous prime is 27726639977. The next prime is 27726640021. The reversal of 27726640008 is 80004662772.

It is a super-2 number, since 2×27726640008² (a number of 22 digits) contains 22 as substring.

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, 1868185 + ... + 1882967.

It is an arithmetic number, because the mean of its divisors is an integer number (1147109040).

Almost surely, 2^27726640008 is an apocalyptic number.

It is an amenable number.

27726640008 is an abundant number, since it is smaller than the sum of its proper divisors (45688338552).

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

27726640008 is a wasteful number, since it uses less digits than its factorization.

27726640008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19406 (or 19402 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 27726640008 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred forty thousand, eight".