278870628336407 has 2 divisors, whose sum is σ = 278870628336408. Its totient is φ = 278870628336406.

The previous prime is 278870628336389. The next prime is 278870628336409. The reversal of 278870628336407 is 704633826078872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278870628336407 - 2⁶ = 278870628336343 is a prime.

It is a super-3 number, since 3×278870628336407³ (a number of 44 digits) contains 333 as substring.

Together with 278870628336409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278870628336409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139435314168203 + 139435314168204.

It is an arithmetic number, because the mean of its divisors is an integer number (139435314168204).

Almost surely, 2^{278870628336407} is an apocalyptic number.

278870628336407 is a deficient number, since it is larger than the sum of its proper divisors (1).

278870628336407 is an equidigital number, since it uses as much as digits as its factorization.

278870628336407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 910393344, while the sum is 71.

The spelling of 278870628336407 in words is "two hundred seventy-eight trillion, eight hundred seventy billion, six hundred twenty-eight million, three hundred thirty-six thousand, four hundred seven".