27750000025 has 12 divisors (see below), whose sum is σ = 37538182224. Its totient is φ = 20181818000.

The previous prime is 27750000001. The next prime is 27750000049. The reversal of 27750000025 is 52000005772.

It is an interprime number because it is at equal distance from previous prime (27750000001) and next prime (27750000049).

It is not a de Polignac number, because 27750000025 - 2³³ = 19160065433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27749999948 and 27750000002.

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, 50454271 + ... + 50454820.

It is an arithmetic number, because the mean of its divisors is an integer number (3128181852).

Almost surely, 2^27750000025 is an apocalyptic number.

27750000025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27750000025 is a deficient number, since it is larger than the sum of its proper divisors (9788182199).

27750000025 is a wasteful number, since it uses less digits than its factorization.

27750000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100909112 (or 100909107 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

Adding to 27750000025 its reverse (52000005772), we get a palindrome (79750005797).

The spelling of 27750000025 in words is "twenty-seven billion, seven hundred fifty million, twenty-five", and thus it is an aban number.