2556956557 has 8 divisors (see below), whose sum is σ = 2622297600. Its totient is φ = 2492071344.

The previous prime is 2556956533. The next prime is 2556956599. The reversal of 2556956557 is 7556596552.

It is a happy number.

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 2556956557 - 2¹¹ = 2556954509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2556956498 and 2556956507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556956057) 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, 102582 + ... + 125047.

It is an arithmetic number, because the mean of its divisors is an integer number (327787200).

Almost surely, 2^2556956557 is an apocalyptic number.

It is an amenable number.

2556956557 is a deficient number, since it is larger than the sum of its proper divisors (65341043).

2556956557 is a wasteful number, since it uses less digits than its factorization.

2556956557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227915.

The product of its digits is 14175000, while the sum is 55.

The square root of 2556956557 is about 50566.3579566494. The cubic root of 2556956557 is about 1367.4384367140.

The spelling of 2556956557 in words is "two billion, five hundred fifty-six million, nine hundred fifty-six thousand, five hundred fifty-seven".