2556487117 has 8 divisors (see below), whose sum is σ = 2562336000. Its totient is φ = 2550646800.

The previous prime is 2556487103. The next prime is 2556487123. The reversal of 2556487117 is 7117846552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556487117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556487177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277884 + ... + 1279882.

It is an arithmetic number, because the mean of its divisors is an integer number (320292000).

Almost surely, 2^2556487117 is an apocalyptic number.

It is an amenable number.

2556487117 is a deficient number, since it is larger than the sum of its proper divisors (5848883).

2556487117 is a wasteful number, since it uses less digits than its factorization.

2556487117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283.

The product of its digits is 470400, while the sum is 46.

The square root of 2556487117 is about 50561.7159222272. The cubic root of 2556487117 is about 1367.3547474302.

The spelling of 2556487117 in words is "two billion, five hundred fifty-six million, four hundred eighty-seven thousand, one hundred seventeen".