55055055065538 has 96 divisors (see below), whose sum is σ = 127624591549440. Its totient is φ = 15699153450240.

The previous prime is 55055055065537. The next prime is 55055055065561. The reversal of 55055055065538 is 83556055055055.

It is not an unprimeable number, because it can be changed into a prime (55055055065537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106996443 + ... + 107509761.

It is an arithmetic number, because the mean of its divisors is an integer number (1329422828640).

Almost surely, 2^{55055055065538} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55055055065538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63812295774720).

55055055065538 is an abundant number, since it is smaller than the sum of its proper divisors (72569536483902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55055055065538 is a wasteful number, since it uses less digits than its factorization.

55055055065538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518992 (or 518975 counting only the distinct ones).

The product of its (nonzero) digits is 56250000, while the sum is 57.

The spelling of 55055055065538 in words is "fifty-five trillion, fifty-five billion, fifty-five million, sixty-five thousand, five hundred thirty-eight".