2556437530 has 8 divisors (see below), whose sum is σ = 4601587572. Its totient is φ = 1022575008.

The previous prime is 2556437519. The next prime is 2556437539. The reversal of 2556437530 is 357346552.

It can be written as a sum of positive squares in 2 ways, for example, as 2519337249 + 37100281 = 50193^2 + 6091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2556437539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127821867 + ... + 127821886.

Almost surely, 2^2556437530 is an apocalyptic number.

2556437530 is a deficient number, since it is larger than the sum of its proper divisors (2045150042).

2556437530 is a wasteful number, since it uses less digits than its factorization.

2556437530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255643760.

The product of its (nonzero) digits is 378000, while the sum is 40.

The square root of 2556437530 is about 50561.2255587224. The cubic root of 2556437530 is about 1367.3459067235.

The spelling of 2556437530 in words is "two billion, five hundred fifty-six million, four hundred thirty-seven thousand, five hundred thirty".