55505505042 has 64 divisors (see below), whose sum is σ = 133068096000. Its totient is φ = 17048479104.

The previous prime is 55505505037. The next prime is 55505505047. The reversal of 55505505042 is 24050550555.

55505505042 is a `hidden beast` number, since 5 + 5 + 50 + 550 + 50 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (55505505037) and next prime (55505505047).

It is a super-2 number, since 2×55505505042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55505504988 and 55505505006.

It is not an unprimeable number, because it can be changed into a prime (55505505047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329959 + ... + 468917.

It is an arithmetic number, because the mean of its divisors is an integer number (2079189000).

Almost surely, 2^55505505042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55505505042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66534048000).

55505505042 is an abundant number, since it is smaller than the sum of its proper divisors (77562590958).

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

55505505042 is a wasteful number, since it uses less digits than its factorization.

55505505042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139552 (or 139546 counting only the distinct ones).

The product of its (nonzero) digits is 125000, while the sum is 36.

The spelling of 55505505042 in words is "fifty-five billion, five hundred five million, five hundred five thousand, forty-two".