2556426505 has 8 divisors (see below), whose sum is σ = 3074702400. Its totient is φ = 2040480816.

The previous prime is 2556426487. The next prime is 2556426511. The reversal of 2556426505 is 5056246552.

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

It is a cyclic number.

It is not a de Polignac number, because 2556426505 - 2¹¹ = 2556424457 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 580135 + ... + 584524.

It is an arithmetic number, because the mean of its divisors is an integer number (384337800).

Almost surely, 2^2556426505 is an apocalyptic number.

It is an amenable number.

2556426505 is a deficient number, since it is larger than the sum of its proper divisors (518275895).

2556426505 is a wasteful number, since it uses less digits than its factorization.

2556426505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165103.

The product of its (nonzero) digits is 360000, while the sum is 40.

The square root of 2556426505 is about 50561.1165323710. The cubic root of 2556426505 is about 1367.3439410962.

The spelling of 2556426505 in words is "two billion, five hundred fifty-six million, four hundred twenty-six thousand, five hundred five".