2556393886 has 8 divisors (see below), whose sum is σ = 3837289824. Its totient is φ = 1277297280.

The previous prime is 2556393881. The next prime is 2556393907. The reversal of 2556393886 is 6883936552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556393881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446275 + ... + 451966.

It is an arithmetic number, because the mean of its divisors is an integer number (479661228).

Almost surely, 2^2556393886 is an apocalyptic number.

2556393886 is a deficient number, since it is larger than the sum of its proper divisors (1280895938).

2556393886 is a wasteful number, since it uses less digits than its factorization.

2556393886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899666.

The product of its digits is 9331200, while the sum is 55.

The square root of 2556393886 is about 50560.7939613294. The cubic root of 2556393886 is about 1367.3381254806.

The spelling of 2556393886 in words is "two billion, five hundred fifty-six million, three hundred ninety-three thousand, eight hundred eighty-six".