55505055550 has 24 divisors (see below), whose sum is σ = 117987890256. Its totient is φ = 19030304640.

The previous prime is 55505055533. The next prime is 55505055581. The reversal of 55505055550 is 5555050555.

It is a super-2 number, since 2×55505055550² (a number of 22 digits) contains 22 as substring.

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, 79292587 + ... + 79293286.

It is an arithmetic number, because the mean of its divisors is an integer number (4916162094).

Almost surely, 2^55505055550 is an apocalyptic number.

55505055550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55505055550 is an abundant number, since it is smaller than the sum of its proper divisors (62482834706).

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

55505055550 is a wasteful number, since it uses less digits than its factorization.

55505055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158585892 (or 158585887 counting only the distinct ones).

The product of its (nonzero) digits is 390625, while the sum is 40.

The spelling of 55505055550 in words is "fifty-five billion, five hundred five million, fifty-five thousand, five hundred fifty".