27749812456 has 16 divisors (see below), whose sum is σ = 52172677440. Its totient is φ = 13837098480.

The previous prime is 27749812439. The next prime is 27749812457. The reversal of 27749812456 is 65421894772.

It is a junction number, because it is equal to n+sod(n) for n = 27749812397 and 27749812406.

It is not an unprimeable number, because it can be changed into a prime (27749812457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4722850 + ... + 4728721.

It is an arithmetic number, because the mean of its divisors is an integer number (3260792340).

Almost surely, 2^27749812456 is an apocalyptic number.

It is an amenable number.

27749812456 is a deficient number, since it is larger than the sum of its proper divisors (24422864984).

27749812456 is a wasteful number, since it uses less digits than its factorization.

27749812456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9451944 (or 9451940 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The spelling of 27749812456 in words is "twenty-seven billion, seven hundred forty-nine million, eight hundred twelve thousand, four hundred fifty-six".