55386878558 has 24 divisors (see below), whose sum is σ = 92038791936. Its totient is φ = 24977604960.

The previous prime is 55386878513. The next prime is 55386878581. The reversal of 55386878558 is 85587868355.

55386878558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870335 + ... + 931802.

It is an arithmetic number, because the mean of its divisors is an integer number (3834949664).

Almost surely, 2^55386878558 is an apocalyptic number.

55386878558 is a deficient number, since it is larger than the sum of its proper divisors (36651913378).

55386878558 is a wasteful number, since it uses less digits than its factorization.

55386878558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802288 (or 1802277 counting only the distinct ones).

The product of its digits is 322560000, while the sum is 68.

The spelling of 55386878558 in words is "fifty-five billion, three hundred eighty-six million, eight hundred seventy-eight thousand, five hundred fifty-eight".