2556444313 has 4 divisors (see below), whose sum is σ = 2579067828. Its totient is φ = 2533820800.

The previous prime is 2556444311. The next prime is 2556444349. The reversal of 2556444313 is 3134446552.

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 465394329 + 2091049984 = 21573^2 + 45728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556444313 - 2¹ = 2556444311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556444311) 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, 11311588 + ... + 11311813.

It is an arithmetic number, because the mean of its divisors is an integer number (644766957).

Almost surely, 2^2556444313 is an apocalyptic number.

It is an amenable number.

2556444313 is a deficient number, since it is larger than the sum of its proper divisors (22623515).

2556444313 is a wasteful number, since it uses less digits than its factorization.

2556444313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22623514.

The product of its digits is 172800, while the sum is 37.

The square root of 2556444313 is about 50561.2926357703. The cubic root of 2556444313 is about 1367.3471160495.

The spelling of 2556444313 in words is "two billion, five hundred fifty-six million, four hundred forty-four thousand, three hundred thirteen".