2778456682 has 4 divisors (see below), whose sum is σ = 4167685026. Its totient is φ = 1389228340.

The previous prime is 2778456671. The next prime is 2778456713. The reversal of 2778456682 is 2866548772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2764551241 + 13905441 = 52579^2 + 3729^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694614169 + ... + 694614172.

Almost surely, 2^2778456682 is an apocalyptic number.

2778456682 is a deficient number, since it is larger than the sum of its proper divisors (1389228344).

2778456682 is a wasteful number, since it uses less digits than its factorization.

2778456682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389228343.

The product of its digits is 9031680, while the sum is 55.

The square root of 2778456682 is about 52711.0679269544. The cubic root of 2778456682 is about 1405.8356215071.

The spelling of 2778456682 in words is "two billion, seven hundred seventy-eight million, four hundred fifty-six thousand, six hundred eighty-two".