2556361436 has 6 divisors (see below), whose sum is σ = 4473632520. Its totient is φ = 1278180716.

The previous prime is 2556361391. The next prime is 2556361477. The reversal of 2556361436 is 6341636552.

It is a junction number, because it is equal to n+sod(n) for n = 2556361393 and 2556361402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319545176 + ... + 319545183.

It is an arithmetic number, because the mean of its divisors is an integer number (745605420).

Almost surely, 2^2556361436 is an apocalyptic number.

It is an amenable number.

2556361436 is a deficient number, since it is larger than the sum of its proper divisors (1917271084).

2556361436 is a wasteful number, since it uses less digits than its factorization.

2556361436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639090363 (or 639090361 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 2556361436 is about 50560.4730594958. The cubic root of 2556361436 is about 1367.3323399468.

Adding to 2556361436 its reverse (6341636552), we get a palindrome (8897997988).

The spelling of 2556361436 in words is "two billion, five hundred fifty-six million, three hundred sixty-one thousand, four hundred thirty-six".