2556618981259 has 8 divisors (see below), whose sum is σ = 2921875604480. Its totient is φ = 2191368693096.

The previous prime is 2556618981247. The next prime is 2556618981341. The reversal of 2556618981259 is 9521898166552.

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 2556618981259 - 2⁵ = 2556618981227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2556618981194 and 2556618981203.

It is not an unprimeable number, because it can be changed into a prime (2556618981659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684969 + ... + 2362714.

It is an arithmetic number, because the mean of its divisors is an integer number (365234450560).

Almost surely, 2^{2556618981259} is an apocalyptic number.

2556618981259 is a deficient number, since it is larger than the sum of its proper divisors (365256623221).

2556618981259 is a wasteful number, since it uses less digits than its factorization.

2556618981259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167529.

The product of its digits is 93312000, while the sum is 67.

The spelling of 2556618981259 in words is "two trillion, five hundred fifty-six billion, six hundred eighteen million, nine hundred eighty-one thousand, two hundred fifty-nine".