278081455667 has 2 divisors, whose sum is σ = 278081455668. Its totient is φ = 278081455666.

The previous prime is 278081455661. The next prime is 278081455681. The reversal of 278081455667 is 766554180872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278081455667 - 2²⁰ = 278080407091 is a prime.

It is not a weakly prime, because it can be changed into another prime (278081455661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139040727833 + 139040727834.

It is an arithmetic number, because the mean of its divisors is an integer number (139040727834).

Almost surely, 2^278081455667 is an apocalyptic number.

278081455667 is a deficient number, since it is larger than the sum of its proper divisors (1).

278081455667 is an equidigital number, since it uses as much as digits as its factorization.

278081455667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 278081455667 in words is "two hundred seventy-eight billion, eighty-one million, four hundred fifty-five thousand, six hundred sixty-seven".