27768351887 has 2 divisors, whose sum is σ = 27768351888. Its totient is φ = 27768351886.

The previous prime is 27768351883. The next prime is 27768351901. The reversal of 27768351887 is 78815386772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27768351887 - 2² = 27768351883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27768351883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13884175943 + 13884175944.

It is an arithmetic number, because the mean of its divisors is an integer number (13884175944).

Almost surely, 2^27768351887 is an apocalyptic number.

27768351887 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768351887 is an equidigital number, since it uses as much as digits as its factorization.

27768351887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31610880, while the sum is 62.

The spelling of 27768351887 in words is "twenty-seven billion, seven hundred sixty-eight million, three hundred fifty-one thousand, eight hundred eighty-seven".