278488490443 has 2 divisors, whose sum is σ = 278488490444. Its totient is φ = 278488490442.

The previous prime is 278488490431. The next prime is 278488490447. The reversal of 278488490443 is 344094884872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278488490443 - 2⁹ = 278488489931 is a prime.

It is not a weakly prime, because it can be changed into another prime (278488490447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139244245221 + 139244245222.

It is an arithmetic number, because the mean of its divisors is an integer number (139244245222).

Almost surely, 2^278488490443 is an apocalyptic number.

278488490443 is a deficient number, since it is larger than the sum of its proper divisors (1).

278488490443 is an equidigital number, since it uses as much as digits as its factorization.

278488490443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49545216, while the sum is 61.

The spelling of 278488490443 in words is "two hundred seventy-eight billion, four hundred eighty-eight million, four hundred ninety thousand, four hundred forty-three".