2778480491 has 2 divisors, whose sum is σ = 2778480492. Its totient is φ = 2778480490.

The previous prime is 2778480461. The next prime is 2778480539. The reversal of 2778480491 is 1940848772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778480491 - 2³⁰ = 1704738667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2778480461) 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, 1389240245 + 1389240246.

It is an arithmetic number, because the mean of its divisors is an integer number (1389240246).

Almost surely, 2^2778480491 is an apocalyptic number.

2778480491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778480491 is an equidigital number, since it uses as much as digits as its factorization.

2778480491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 2778480491 is about 52711.2937708799. The cubic root of 2778480491 is about 1405.8396370990.

The spelling of 2778480491 in words is "two billion, seven hundred seventy-eight million, four hundred eighty thousand, four hundred ninety-one".