2556161730 has 48 divisors (see below), whose sum is σ = 6860415744. Its totient is φ = 659653920.

The previous prime is 2556161719. The next prime is 2556161731. The reversal of 2556161730 is 371616552.

2556161730 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 1 + 617 + 30 = 666.

It is not an unprimeable number, because it can be changed into a prime (2556161731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455304 + ... + 460883.

It is an arithmetic number, because the mean of its divisors is an integer number (142925328).

Almost surely, 2^2556161730 is an apocalyptic number.

2556161730 is an abundant number, since it is smaller than the sum of its proper divisors (4304254014).

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

2556161730 is a wasteful number, since it uses less digits than its factorization.

2556161730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916231 (or 916228 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 2556161730 is about 50558.4980987371. The cubic root of 2556161730 is about 1367.2967331426.

The spelling of 2556161730 in words is "two billion, five hundred fifty-six million, one hundred sixty-one thousand, seven hundred thirty".