2556263240 has 32 divisors (see below), whose sum is σ = 6001663680. Its totient is φ = 978048192.

The previous prime is 2556263233. The next prime is 2556263279. The reversal of 2556263240 is 423626552.

2556263240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2556263240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388354 + ... + 1390193.

It is an arithmetic number, because the mean of its divisors is an integer number (187551990).

Almost surely, 2^2556263240 is an apocalyptic number.

2556263240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556263240 is an abundant number, since it is smaller than the sum of its proper divisors (3445400440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556263240 is a wasteful number, since it uses less digits than its factorization.

2556263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778581 (or 2778577 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 2556263240 is about 50559.5019753953. The cubic root of 2556263240 is about 1367.3148322131.

Adding to 2556263240 its reverse (423626552), we get a palindrome (2979889792).

The spelling of 2556263240 in words is "two billion, five hundred fifty-six million, two hundred sixty-three thousand, two hundred forty".