2556272649 has 16 divisors (see below), whose sum is σ = 3959131520. Its totient is φ = 1436780160.

The previous prime is 2556272629. The next prime is 2556272669. The reversal of 2556272649 is 9462726552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2556272629) and next prime (2556272669).

It is not a de Polignac number, because 2556272649 - 2¹⁶ = 2556207113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2556272598 and 2556272607.

It is not an unprimeable number, because it can be changed into a prime (2556272629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996484 + ... + 999045.

It is an arithmetic number, because the mean of its divisors is an integer number (247445720).

Almost surely, 2^2556272649 is an apocalyptic number.

It is an amenable number.

2556272649 is a deficient number, since it is larger than the sum of its proper divisors (1402858871).

2556272649 is a wasteful number, since it uses less digits than its factorization.

2556272649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995600.

The product of its digits is 1814400, while the sum is 48.

The square root of 2556272649 is about 50559.5950240901. The cubic root of 2556272649 is about 1367.3165097985.

The spelling of 2556272649 in words is "two billion, five hundred fifty-six million, two hundred seventy-two thousand, six hundred forty-nine".