27725747775 has 24 divisors (see below), whose sum is σ = 50007168384. Its totient is φ = 13442786400.

The previous prime is 27725747717. The next prime is 27725747789. The reversal of 27725747775 is 57774752772.

It is a happy number.

It is not a de Polignac number, because 27725747775 - 2⁹ = 27725747263 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16802659 + ... + 16804308.

It is an arithmetic number, because the mean of its divisors is an integer number (2083632016).

Almost surely, 2^27725747775 is an apocalyptic number.

27725747775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27725747775 is a deficient number, since it is larger than the sum of its proper divisors (22281420609).

27725747775 is a wasteful number, since it uses less digits than its factorization.

27725747775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33606991 (or 33606986 counting only the distinct ones).

The product of its digits is 47059600, while the sum is 60.

The spelling of 27725747775 in words is "twenty-seven billion, seven hundred twenty-five million, seven hundred forty-seven thousand, seven hundred seventy-five".