278354999011 has 2 divisors, whose sum is σ = 278354999012. Its totient is φ = 278354999010.

The previous prime is 278354998993. The next prime is 278354999017. The reversal of 278354999011 is 110999453872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278354999011 - 2¹³ = 278354990819 is a prime.

It is not a weakly prime, because it can be changed into another prime (278354999017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139177499505 + 139177499506.

It is an arithmetic number, because the mean of its divisors is an integer number (139177499506).

Almost surely, 2^278354999011 is an apocalyptic number.

278354999011 is a deficient number, since it is larger than the sum of its proper divisors (1).

278354999011 is an equidigital number, since it uses as much as digits as its factorization.

278354999011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 278354999011 in words is "two hundred seventy-eight billion, three hundred fifty-four million, nine hundred ninety-nine thousand, eleven".