278432262893 has 2 divisors, whose sum is σ = 278432262894. Its totient is φ = 278432262892.

The previous prime is 278432262863. The next prime is 278432262907. The reversal of 278432262893 is 398262234872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215813206249 + 62619056644 = 464557^2 + 250238^2 .

It is a cyclic number.

It is not a de Polignac number, because 278432262893 - 2⁸ = 278432262637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278432262863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139216131446 + 139216131447.

It is an arithmetic number, because the mean of its divisors is an integer number (139216131447).

Almost surely, 2^278432262893 is an apocalyptic number.

It is an amenable number.

278432262893 is a deficient number, since it is larger than the sum of its proper divisors (1).

278432262893 is an equidigital number, since it uses as much as digits as its factorization.

278432262893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 56.

The spelling of 278432262893 in words is "two hundred seventy-eight billion, four hundred thirty-two million, two hundred sixty-two thousand, eight hundred ninety-three".