27956388863 has 32 divisors (see below), whose sum is σ = 31339779072. Its totient is φ = 24771225600.

The previous prime is 27956388851. The next prime is 27956388869. The reversal of 27956388863 is 36888365972.

It is a cyclic number.

It is not a de Polignac number, because 27956388863 - 2¹⁸ = 27956126719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27956388863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27956388869) 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 31 ways as a sum of consecutive naturals, for example, 25718306 + ... + 25719392.

It is an arithmetic number, because the mean of its divisors is an integer number (979368096).

Almost surely, 2^27956388863 is an apocalyptic number.

27956388863 is a deficient number, since it is larger than the sum of its proper divisors (3383390209).

27956388863 is a wasteful number, since it uses less digits than its factorization.

27956388863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875.

The product of its digits is 104509440, while the sum is 65.

The spelling of 27956388863 in words is "twenty-seven billion, nine hundred fifty-six million, three hundred eighty-eight thousand, eight hundred sixty-three".