2556441663 has 16 divisors (see below), whose sum is σ = 3437089920. Its totient is φ = 1690097184.

The previous prime is 2556441631. The next prime is 2556441683. The reversal of 2556441663 is 3661446552.

It is not a de Polignac number, because 2556441663 - 2⁵ = 2556441631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556441683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193920 + ... + 206682.

It is an arithmetic number, because the mean of its divisors is an integer number (214818120).

Almost surely, 2^2556441663 is an apocalyptic number.

2556441663 is a deficient number, since it is larger than the sum of its proper divisors (880648257).

2556441663 is a wasteful number, since it uses less digits than its factorization.

2556441663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13318.

The product of its digits is 518400, while the sum is 42.

The square root of 2556441663 is about 50561.2664299462. The cubic root of 2556441663 is about 1367.3466435872.

The spelling of 2556441663 in words is "two billion, five hundred fifty-six million, four hundred forty-one thousand, six hundred sixty-three".