2556783122 has 4 divisors (see below), whose sum is σ = 3835174686. Its totient is φ = 1278391560.

The previous prime is 2556783121. The next prime is 2556783143. The reversal of 2556783122 is 2213876552.

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., 1553857561 + 1002925561 = 39419^2 + 31669^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2556783122.

It is not an unprimeable number, because it can be changed into a prime (2556783121) 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 as a sum of consecutive naturals, namely, 639195779 + ... + 639195782.

Almost surely, 2^2556783122 is an apocalyptic number.

2556783122 is a deficient number, since it is larger than the sum of its proper divisors (1278391564).

2556783122 is a wasteful number, since it uses less digits than its factorization.

2556783122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278391563.

The product of its digits is 201600, while the sum is 41.

The square root of 2556783122 is about 50564.6430027940. The cubic root of 2556783122 is about 1367.4075188314.

The spelling of 2556783122 in words is "two billion, five hundred fifty-six million, seven hundred eighty-three thousand, one hundred twenty-two".