27800975473 has 2 divisors, whose sum is σ = 27800975474. Its totient is φ = 27800975472.

The previous prime is 27800975467. The next prime is 27800975509. The reversal of 27800975473 is 37457900872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26566718049 + 1234257424 = 162993^2 + 35132^2 .

It is a cyclic number.

It is not a de Polignac number, because 27800975473 - 2¹³ = 27800967281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27800975473.

It is not a weakly prime, because it can be changed into another prime (27800975443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900487736 + 13900487737.

It is an arithmetic number, because the mean of its divisors is an integer number (13900487737).

Almost surely, 2^27800975473 is an apocalyptic number.

It is an amenable number.

27800975473 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800975473 is an equidigital number, since it uses as much as digits as its factorization.

27800975473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 27800975473 in words is "twenty-seven billion, eight hundred million, nine hundred seventy-five thousand, four hundred seventy-three".