2556003630 has 32 divisors (see below), whose sum is σ = 6332295168. Its totient is φ = 659613600.

The previous prime is 2556003577. The next prime is 2556003631. The reversal of 2556003630 is 363006552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556003631) 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, 1373266 + ... + 1375125.

It is an arithmetic number, because the mean of its divisors is an integer number (197884224).

Almost surely, 2^2556003630 is an apocalyptic number.

2556003630 is an abundant number, since it is smaller than the sum of its proper divisors (3776291538).

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

2556003630 is a wasteful number, since it uses less digits than its factorization.

2556003630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748432.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 2556003630 is about 50556.9345391906. The cubic root of 2556003630 is about 1367.2685432113.

The spelling of 2556003630 in words is "two billion, five hundred fifty-six million, three thousand, six hundred thirty".