278235050641 has 2 divisors, whose sum is σ = 278235050642. Its totient is φ = 278235050640.

The previous prime is 278235050633. The next prime is 278235050657. The reversal of 278235050641 is 146050532872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239394918400 + 38840132241 = 489280^2 + 197079^2 .

It is a cyclic number.

It is not a de Polignac number, because 278235050641 - 2³ = 278235050633 is a prime.

It is not a weakly prime, because it can be changed into another prime (278235050671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139117525320 + 139117525321.

It is an arithmetic number, because the mean of its divisors is an integer number (139117525321).

Almost surely, 2^278235050641 is an apocalyptic number.

It is an amenable number.

278235050641 is a deficient number, since it is larger than the sum of its proper divisors (1).

278235050641 is an equidigital number, since it uses as much as digits as its factorization.

278235050641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 278235050641 in words is "two hundred seventy-eight billion, two hundred thirty-five million, fifty thousand, six hundred forty-one".