555561105550 has 72 divisors (see below), whose sum is σ = 1130676772680. Its totient is φ = 201416011200.

The previous prime is 555561105511. The next prime is 555561105551. The reversal of 555561105550 is 55501165555.

It is a junction number, because it is equal to n+sod(n) for n = 555561105497 and 555561105506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555561105551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66220756 + ... + 66229144.

It is an arithmetic number, because the mean of its divisors is an integer number (15703844065).

Almost surely, 2^555561105550 is an apocalyptic number.

555561105550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

555561105550 is an abundant number, since it is smaller than the sum of its proper divisors (575115667130).

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

555561105550 is a wasteful number, since it uses less digits than its factorization.

555561105550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106 (or 8754 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 555561105550 in words is "five hundred fifty-five billion, five hundred sixty-one million, one hundred five thousand, five hundred fifty".