2556261332 has 6 divisors (see below), whose sum is σ = 4473457338. Its totient is φ = 1278130664.

The previous prime is 2556261299. The next prime is 2556261341. The reversal of 2556261332 is 2331626552.

It can be written as a sum of positive squares in only one way, i.e., 2496601156 + 59660176 = 49966^2 + 7724^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2556261292 and 2556261301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319532663 + ... + 319532670.

It is an arithmetic number, because the mean of its divisors is an integer number (745576223).

Almost surely, 2^2556261332 is an apocalyptic number.

It is an amenable number.

2556261332 is a deficient number, since it is larger than the sum of its proper divisors (1917196006).

2556261332 is a wasteful number, since it uses less digits than its factorization.

2556261332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639065337 (or 639065335 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 2556261332 is about 50559.4831065350. The cubic root of 2556261332 is about 1367.3144920242.

Adding to 2556261332 its reverse (2331626552), we get a palindrome (4887887884).

The spelling of 2556261332 in words is "two billion, five hundred fifty-six million, two hundred sixty-one thousand, three hundred thirty-two".