2552778013 has 4 divisors (see below), whose sum is σ = 2556761148. Its totient is φ = 2548794880.

The previous prime is 2552777971. The next prime is 2552778061. The reversal of 2552778013 is 3108772552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 995844249 + 1556933764 = 31557^2 + 39458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2552778013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2552778083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990606 + ... + 1991887.

It is an arithmetic number, because the mean of its divisors is an integer number (639190287).

Almost surely, 2^2552778013 is an apocalyptic number.

It is an amenable number.

2552778013 is a deficient number, since it is larger than the sum of its proper divisors (3983135).

2552778013 is an equidigital number, since it uses as much as digits as its factorization.

2552778013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983134.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 2552778013 is about 50525.0236318599. The cubic root of 2552778013 is about 1366.6931474213.

The spelling of 2552778013 in words is "two billion, five hundred fifty-two million, seven hundred seventy-eight thousand, thirteen".