55517986438 has 32 divisors (see below), whose sum is σ = 86504140800. Its totient is φ = 26706517344.

The previous prime is 55517986417. The next prime is 55517986451. The reversal of 55517986438 is 83468971555.

55517986438 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 15 ways as a sum of consecutive naturals, for example, 1684231 + ... + 1716877.

It is an arithmetic number, because the mean of its divisors is an integer number (2703254400).

Almost surely, 2^55517986438 is an apocalyptic number.

55517986438 is a deficient number, since it is larger than the sum of its proper divisors (30986154362).

55517986438 is a wasteful number, since it uses less digits than its factorization.

55517986438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33004.

The product of its digits is 36288000, while the sum is 61.

The spelling of 55517986438 in words is "fifty-five billion, five hundred seventeen million, nine hundred eighty-six thousand, four hundred thirty-eight".