278114450671 has 2 divisors, whose sum is σ = 278114450672. Its totient is φ = 278114450670.

The previous prime is 278114450599. The next prime is 278114450681. The reversal of 278114450671 is 176054411872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278114450671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278114450681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139057225335 + 139057225336.

It is an arithmetic number, because the mean of its divisors is an integer number (139057225336).

Almost surely, 2^278114450671 is an apocalyptic number.

278114450671 is a deficient number, since it is larger than the sum of its proper divisors (1).

278114450671 is an equidigital number, since it uses as much as digits as its factorization.

278114450671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 278114450671 in words is "two hundred seventy-eight billion, one hundred fourteen million, four hundred fifty thousand, six hundred seventy-one".