278330217073 has 2 divisors, whose sum is σ = 278330217074. Its totient is φ = 278330217072.

The previous prime is 278330217071. The next prime is 278330217083. The reversal of 278330217073 is 370712033872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277315985664 + 1014231409 = 526608^2 + 31847^2 .

It is a cyclic number.

It is not a de Polignac number, because 278330217073 - 2¹ = 278330217071 is a prime.

Together with 278330217071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (278330217071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139165108536 + 139165108537.

It is an arithmetic number, because the mean of its divisors is an integer number (139165108537).

Almost surely, 2^278330217073 is an apocalyptic number.

It is an amenable number.

278330217073 is a deficient number, since it is larger than the sum of its proper divisors (1).

278330217073 is an equidigital number, since it uses as much as digits as its factorization.

278330217073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 278330217073 in words is "two hundred seventy-eight billion, three hundred thirty million, two hundred seventeen thousand, seventy-three".