55509595550 has 12 divisors (see below), whose sum is σ = 103247847816. Its totient is φ = 22203838200.

The previous prime is 55509595549. The next prime is 55509595613. The reversal of 55509595550 is 5559590555.

It is a junction number, because it is equal to n+sod(n) for n = 55509595492 and 55509595501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555095906 + ... + 555096005.

It is an arithmetic number, because the mean of its divisors is an integer number (8603987318).

Almost surely, 2^55509595550 is an apocalyptic number.

55509595550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55509595550 is a deficient number, since it is larger than the sum of its proper divisors (47738252266).

55509595550 is a wasteful number, since it uses less digits than its factorization.

55509595550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110191923 (or 1110191918 counting only the distinct ones).

The product of its (nonzero) digits is 6328125, while the sum is 53.

The spelling of 55509595550 in words is "fifty-five billion, five hundred nine million, five hundred ninety-five thousand, five hundred fifty".