27754977771 has 24 divisors (see below), whose sum is σ = 41543124480. Its totient is φ = 17835046656.

The previous prime is 27754977737. The next prime is 27754977781. The reversal of 27754977771 is 17777945772.

27754977771 is a `hidden beast` number, since 2 + 7 + 7 + 5 + 497 + 77 + 71 = 666.

It is not a de Polignac number, because 27754977771 - 2²³ = 27746589163 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 27754977699 and 27754977708.

It is not an unprimeable number, because it can be changed into a prime (27754977781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65110 + ... + 244436.

It is an arithmetic number, because the mean of its divisors is an integer number (1730963520).

Almost surely, 2^27754977771 is an apocalyptic number.

27754977771 is a deficient number, since it is larger than the sum of its proper divisors (13788146709).

27754977771 is a wasteful number, since it uses less digits than its factorization.

27754977771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179955 (or 179952 counting only the distinct ones).

The product of its digits is 42353640, while the sum is 63.

The spelling of 27754977771 in words is "twenty-seven billion, seven hundred fifty-four million, nine hundred seventy-seven thousand, seven hundred seventy-one".