2556218832 has 80 divisors (see below), whose sum is σ = 6945412608. Its totient is φ = 809003520.

The previous prime is 2556218831. The next prime is 2556218839. The reversal of 2556218832 is 2388126552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556218831) 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, 62658 + ... + 95070.

Almost surely, 2^2556218832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556218832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3472706304).

2556218832 is an abundant number, since it is smaller than the sum of its proper divisors (4389193776).

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

2556218832 is a wasteful number, since it uses less digits than its factorization.

2556218832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32508 (or 32502 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 2556218832 is about 50559.0628077697. The cubic root of 2556218832 is about 1367.3069143968.

The spelling of 2556218832 in words is "two billion, five hundred fifty-six million, two hundred eighteen thousand, eight hundred thirty-two".