27800975443 has 2 divisors, whose sum is σ = 27800975444. Its totient is φ = 27800975442.

The previous prime is 27800975431. The next prime is 27800975467. The reversal of 27800975443 is 34457900872.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27800975443 - 2⁹ = 27800974931 is a prime.

It is not a weakly prime, because it can be changed into another prime (27800975473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900487721 + 13900487722.

It is an arithmetic number, because the mean of its divisors is an integer number (13900487722).

Almost surely, 2^27800975443 is an apocalyptic number.

27800975443 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800975443 is an equidigital number, since it uses as much as digits as its factorization.

27800975443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 27800975443 in words is "twenty-seven billion, eight hundred million, nine hundred seventy-five thousand, four hundred forty-three".