2556324361 has 4 divisors (see below), whose sum is σ = 2556730372. Its totient is φ = 2555918352.

The previous prime is 2556324343. The next prime is 2556324367. The reversal of 2556324361 is 1634236552.

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 857318400 + 1699005961 = 29280^2 + 41219^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556324361 - 2²⁷ = 2422106633 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 2556324361.

It is not an unprimeable number, because it can be changed into a prime (2556324367) 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, 193410 + ... + 206203.

It is an arithmetic number, because the mean of its divisors is an integer number (639182593).

Almost surely, 2^2556324361 is an apocalyptic number.

It is an amenable number.

2556324361 is a deficient number, since it is larger than the sum of its proper divisors (406011).

2556324361 is an equidigital number, since it uses as much as digits as its factorization.

2556324361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406010.

The product of its digits is 129600, while the sum is 37.

The square root of 2556324361 is about 50560.1064180051. The cubic root of 2556324361 is about 1367.3257297585.

The spelling of 2556324361 in words is "two billion, five hundred fifty-six million, three hundred twenty-four thousand, three hundred sixty-one".