2556717393 has 8 divisors (see below), whose sum is σ = 3409693056. Its totient is φ = 1704110000.

The previous prime is 2556717307. The next prime is 2556717409. The reversal of 2556717393 is 3937176552.

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 2556717393 - 2⁹ = 2556716881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2556717593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75438 + ... + 103943.

It is an arithmetic number, because the mean of its divisors is an integer number (426211632).

Almost surely, 2^2556717393 is an apocalyptic number.

It is an amenable number.

2556717393 is a deficient number, since it is larger than the sum of its proper divisors (852975663).

2556717393 is a wasteful number, since it uses less digits than its factorization.

2556717393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184135.

The product of its digits is 1190700, while the sum is 48.

The square root of 2556717393 is about 50563.9930484134. The cubic root of 2556717393 is about 1367.3958010993.

The spelling of 2556717393 in words is "two billion, five hundred fifty-six million, seven hundred seventeen thousand, three hundred ninety-three".