27800505275 has 12 divisors (see below), whose sum is σ = 34476700344. Its totient is φ = 22237776000.

The previous prime is 27800505269. The next prime is 27800505347. The reversal of 27800505275 is 57250500872.

It is not a de Polignac number, because 27800505275 - 2²⁴ = 27783728059 is a prime.

It is a Duffinian 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, 166115 + ... + 288435.

It is an arithmetic number, because the mean of its divisors is an integer number (2873058362).

Almost surely, 2^27800505275 is an apocalyptic number.

27800505275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27800505275 is a deficient number, since it is larger than the sum of its proper divisors (6676195069).

27800505275 is a wasteful number, since it uses less digits than its factorization.

27800505275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131422 (or 131417 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 41.

The spelling of 27800505275 in words is "twenty-seven billion, eight hundred million, five hundred five thousand, two hundred seventy-five".