12778555459 has 2 divisors, whose sum is σ = 12778555460. Its totient is φ = 12778555458.

The previous prime is 12778555423. The next prime is 12778555463. The reversal of 12778555459 is 95455587721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12778555459 - 2⁹ = 12778554947 is a prime.

It is not a weakly prime, because it can be changed into another prime (12778555499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389277729 + 6389277730.

It is an arithmetic number, because the mean of its divisors is an integer number (6389277730).

Almost surely, 2^12778555459 is an apocalyptic number.

12778555459 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778555459 is an equidigital number, since it uses as much as digits as its factorization.

12778555459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640000, while the sum is 58.

The spelling of 12778555459 in words is "twelve billion, seven hundred seventy-eight million, five hundred fifty-five thousand, four hundred fifty-nine".