2648002778 has 4 divisors (see below), whose sum is σ = 3972004170. Its totient is φ = 1324001388.

The previous prime is 2648002769. The next prime is 2648002781. The reversal of 2648002778 is 8772008462.

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., 2646382249 + 1620529 = 51443^2 + 1273^2 .

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, 662000693 + ... + 662000696.

Almost surely, 2^2648002778 is an apocalyptic number.

2648002778 is a deficient number, since it is larger than the sum of its proper divisors (1324001392).

2648002778 is a wasteful number, since it uses less digits than its factorization.

2648002778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324001391.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 2648002778 is about 51458.7483135764. The cubic root of 2648002778 is about 1383.4797671215.

The spelling of 2648002778 in words is "two billion, six hundred forty-eight million, two thousand, seven hundred seventy-eight".