278255999999 has 2 divisors, whose sum is σ = 278256000000. Its totient is φ = 278255999998.

The previous prime is 278255999963. The next prime is 278256000013. The reversal of 278255999999 is 999999552872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278255999999 - 2²⁴ = 278239222783 is a prime.

278255999999 is a modest number, since divided by 999999 gives 278255 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278255999929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139127999999 + 139128000000.

It is an arithmetic number, because the mean of its divisors is an integer number (139128000000).

Almost surely, 2^278255999999 is an apocalyptic number.

278255999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

278255999999 is an equidigital number, since it uses as much as digits as its factorization.

278255999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2976069600, while the sum is 83.

The spelling of 278255999999 in words is "two hundred seventy-eight billion, two hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".