2556361441 has 4 divisors (see below), whose sum is σ = 2690906800. Its totient is φ = 2421816084.

The previous prime is 2556361391. The next prime is 2556361477. The reversal of 2556361441 is 1441636552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2556361441 - 2²⁵ = 2522807009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556361441.

It is not an unprimeable number, because it can be changed into a prime (2556361141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67272651 + ... + 67272688.

It is an arithmetic number, because the mean of its divisors is an integer number (672726700).

Almost surely, 2^2556361441 is an apocalyptic number.

It is an amenable number.

2556361441 is a deficient number, since it is larger than the sum of its proper divisors (134545359).

2556361441 is a wasteful number, since it uses less digits than its factorization.

2556361441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134545358.

The product of its digits is 86400, while the sum is 37.

The square root of 2556361441 is about 50560.4731089415. The cubic root of 2556361441 is about 1367.3323408383.

Adding to 2556361441 its reverse (1441636552), we get a palindrome (3997997993).

The spelling of 2556361441 in words is "two billion, five hundred fifty-six million, three hundred sixty-one thousand, four hundred forty-one".