27800881748 has 6 divisors (see below), whose sum is σ = 48651543066. Its totient is φ = 13900440872.

The previous prime is 27800881741. The next prime is 27800881769. The reversal of 27800881748 is 84718800872.

It can be written as a sum of positive squares in only one way, i.e., 20376991504 + 7423890244 = 142748^2 + 86162^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27800881748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800881741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3475110215 + ... + 3475110222.

It is an arithmetic number, because the mean of its divisors is an integer number (8108590511).

Almost surely, 2^27800881748 is an apocalyptic number.

It is an amenable number.

27800881748 is a deficient number, since it is larger than the sum of its proper divisors (20850661318).

27800881748 is a wasteful number, since it uses less digits than its factorization.

27800881748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950220441 (or 6950220439 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 53.

The spelling of 27800881748 in words is "twenty-seven billion, eight hundred million, eight hundred eighty-one thousand, seven hundred forty-eight".