551000055550 has 48 divisors (see below), whose sum is σ = 1179129664800. Its totient is φ = 187646405760.

The previous prime is 551000055521. The next prime is 551000055553. The reversal of 551000055550 is 55550000155.

It is a super-2 number, since 2×551000055550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551000055553) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5230689 + ... + 5334988.

It is an arithmetic number, because the mean of its divisors is an integer number (24565201350).

Almost surely, 2^551000055550 is an apocalyptic number.

551000055550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551000055550 is an abundant number, since it is smaller than the sum of its proper divisors (628129609250).

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

551000055550 is a wasteful number, since it uses less digits than its factorization.

551000055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565845 (or 10565840 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 551000055550 in words is "five hundred fifty-one billion, fifty-five thousand, five hundred fifty".