27758890168 has 8 divisors (see below), whose sum is σ = 52047919080. Its totient is φ = 13879445080.

The previous prime is 27758890163. The next prime is 27758890177. The reversal of 27758890168 is 86109885772.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27758890163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1734930628 + ... + 1734930643.

It is an arithmetic number, because the mean of its divisors is an integer number (6505989885).

Almost surely, 2^27758890168 is an apocalyptic number.

It is an amenable number.

27758890168 is a deficient number, since it is larger than the sum of its proper divisors (24289028912).

27758890168 is a wasteful number, since it uses less digits than its factorization.

27758890168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469861277 (or 3469861273 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 27758890168 in words is "twenty-seven billion, seven hundred fifty-eight million, eight hundred ninety thousand, one hundred sixty-eight".