55418375550 has 24 divisors (see below), whose sum is σ = 137437571736. Its totient is φ = 14778233440.

The previous prime is 55418375491. The next prime is 55418375567. The reversal of 55418375550 is 5557381455.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55418375550.

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, 184727769 + ... + 184728068.

It is an arithmetic number, because the mean of its divisors is an integer number (5726565489).

Almost surely, 2^55418375550 is an apocalyptic number.

55418375550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55418375550 is an abundant number, since it is smaller than the sum of its proper divisors (82019196186).

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

55418375550 is a wasteful number, since it uses less digits than its factorization.

55418375550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369455852 (or 369455847 counting only the distinct ones).

The product of its (nonzero) digits is 2100000, while the sum is 48.

The spelling of 55418375550 in words is "fifty-five billion, four hundred eighteen million, three hundred seventy-five thousand, five hundred fifty".