55505505150 has 120 divisors (see below), whose sum is σ = 154308878064. Its totient is φ = 14793235200.

The previous prime is 55505505103. The next prime is 55505505151. The reversal of 55505505150 is 5150550555.

It is a happy number.

55505505150 is a `hidden beast` number, since 5 + 5 + 5 + 0 + 550 + 51 + 50 = 666.

It is a super-2 number, since 2×55505505150² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505505151) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 11754790 + ... + 11759510.

Almost surely, 2^55505505150 is an apocalyptic number.

55505505150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55505505150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77154439032).

55505505150 is an abundant number, since it is smaller than the sum of its proper divisors (98803372914).

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

55505505150 is a wasteful number, since it uses less digits than its factorization.

55505505150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648 (or 7634 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 55505505150 in words is "fifty-five billion, five hundred five million, five hundred five thousand, one hundred fifty".