27771606164 has 24 divisors (see below), whose sum is σ = 51495393600. Its totient is φ = 13059787136.

The previous prime is 27771606067. The next prime is 27771606167. The reversal of 27771606164 is 46160617772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771606167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46064 + ... + 240135.

It is an arithmetic number, because the mean of its divisors is an integer number (2145641400).

Almost surely, 2^27771606164 is an apocalyptic number.

It is an amenable number.

27771606164 is a deficient number, since it is larger than the sum of its proper divisors (23723787436).

27771606164 is a wasteful number, since it uses less digits than its factorization.

27771606164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287647 (or 287645 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 27771606164 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred six thousand, one hundred sixty-four".