27765401288775 has 12 divisors (see below), whose sum is σ = 45905463464232. Its totient is φ = 14808214020640.

The previous prime is 27765401288767. The next prime is 27765401288783. The reversal of 27765401288775 is 57788210456772.

It is an interprime number because it is at equal distance from previous prime (27765401288767) and next prime (27765401288783).

It is not a de Polignac number, because 27765401288775 - 2³ = 27765401288767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185102675184 + ... + 185102675333.

It is an arithmetic number, because the mean of its divisors is an integer number (3825455288686).

Almost surely, 2^{27765401288775} is an apocalyptic number.

27765401288775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27765401288775 is a deficient number, since it is larger than the sum of its proper divisors (18140062175457).

27765401288775 is a wasteful number, since it uses less digits than its factorization.

27765401288775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370205350530 (or 370205350525 counting only the distinct ones).

The product of its (nonzero) digits is 368793600, while the sum is 69.

The spelling of 27765401288775 in words is "twenty-seven trillion, seven hundred sixty-five billion, four hundred one million, two hundred eighty-eight thousand, seven hundred seventy-five".