2778000005 has 16 divisors (see below), whose sum is σ = 3850576704. Its totient is φ = 1901518080.

The previous prime is 2777999953. The next prime is 2778000061. The reversal of 2778000005 is 5000008772.

It is not a de Polignac number, because 2778000005 - 2¹⁸ = 2777737861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1484627 + ... + 1486496.

It is an arithmetic number, because the mean of its divisors is an integer number (240661044).

Almost surely, 2^2778000005 is an apocalyptic number.

It is an amenable number.

2778000005 is a deficient number, since it is larger than the sum of its proper divisors (1072576699).

2778000005 is a wasteful number, since it uses less digits than its factorization.

2778000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971156.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 2778000005 is about 52706.7358598500. The cubic root of 2778000005 is about 1405.7585945763.

Adding to 2778000005 its reverse (5000008772), we get a palindrome (7778008777).

The spelling of 2778000005 in words is "two billion, seven hundred seventy-eight million, five", and thus it is an aban number.