2555556540 has 48 divisors (see below), whose sum is σ = 7226422560. Its totient is φ = 674732800.

The previous prime is 2555556511. The next prime is 2555556541. The reversal of 2555556540 is 456555552.

It is a junction number, because it is equal to n+sod(n) for n = 2555556492 and 2555556501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555556541) 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, 204795 + ... + 216914.

It is an arithmetic number, because the mean of its divisors is an integer number (150550470).

Almost surely, 2^2555556540 is an apocalyptic number.

2555556540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555556540 is an abundant number, since it is smaller than the sum of its proper divisors (4670866020).

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

2555556540 is a wasteful number, since it uses less digits than its factorization.

2555556540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421822 (or 421820 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 42.

The square root of 2555556540 is about 50552.5126971944. The cubic root of 2555556540 is about 1367.1888187890.

The spelling of 2555556540 in words is "two billion, five hundred fifty-five million, five hundred fifty-six thousand, five hundred forty".