2556430272 has 168 divisors, whose sum is σ = 8269925040. Its totient is φ = 747909120.

The previous prime is 2556430271. The next prime is 2556430277. The reversal of 2556430272 is 2720346552.

2556430272 is a `hidden beast` number, since 2 + 5 + 5 + 643 + 0 + 2 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556430271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176788 + ... + 190700.

Almost surely, 2^2556430272 is an apocalyptic number.

2556430272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556430272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4134962520).

2556430272 is an abundant number, since it is smaller than the sum of its proper divisors (5713494768).

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

2556430272 is a wasteful number, since it uses less digits than its factorization.

2556430272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971 (or 13958 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 2556430272 is about 50561.1537843036. The cubic root of 2556430272 is about 1367.3446127085.

The spelling of 2556430272 in words is "two billion, five hundred fifty-six million, four hundred thirty thousand, two hundred seventy-two".