278191586479 has 2 divisors, whose sum is σ = 278191586480. Its totient is φ = 278191586478.

The previous prime is 278191586459. The next prime is 278191586503. The reversal of 278191586479 is 974685191872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278191586479 - 2¹⁵ = 278191553711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278191586459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139095793239 + 139095793240.

It is an arithmetic number, because the mean of its divisors is an integer number (139095793240).

Almost surely, 2^278191586479 is an apocalyptic number.

278191586479 is a deficient number, since it is larger than the sum of its proper divisors (1).

278191586479 is an equidigital number, since it uses as much as digits as its factorization.

278191586479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60963840, while the sum is 67.

The spelling of 278191586479 in words is "two hundred seventy-eight billion, one hundred ninety-one million, five hundred eighty-six thousand, four hundred seventy-nine".