278025252487 has 2 divisors, whose sum is σ = 278025252488. Its totient is φ = 278025252486.

The previous prime is 278025252469. The next prime is 278025252553. The reversal of 278025252487 is 784252520872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278025252487 - 2³¹ = 275877768839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278025252187) 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, 139012626243 + 139012626244.

It is an arithmetic number, because the mean of its divisors is an integer number (139012626244).

Almost surely, 2^278025252487 is an apocalyptic number.

278025252487 is a deficient number, since it is larger than the sum of its proper divisors (1).

278025252487 is an equidigital number, since it uses as much as digits as its factorization.

278025252487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5017600, while the sum is 52.

The spelling of 278025252487 in words is "two hundred seventy-eight billion, twenty-five million, two hundred fifty-two thousand, four hundred eighty-seven".