550005555551 has 4 divisors (see below), whose sum is σ = 550420029792. Its totient is φ = 549591081312.

The previous prime is 550005555479. The next prime is 550005555557. The reversal of 550005555551 is 155555500055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550005555551 is a prime.

It is a super-2 number, since 2×550005555551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550005555499 and 550005555508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550005555557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207235130 + ... + 207237783.

It is an arithmetic number, because the mean of its divisors is an integer number (137605007448).

Almost surely, 2^550005555551 is an apocalyptic number.

550005555551 is a deficient number, since it is larger than the sum of its proper divisors (414474241).

550005555551 is a wasteful number, since it uses less digits than its factorization.

550005555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414474240.

The product of its (nonzero) digits is 390625, while the sum is 41.

The spelling of 550005555551 in words is "five hundred fifty billion, five million, five hundred fifty-five thousand, five hundred fifty-one".