550555555501 has 4 divisors (see below), whose sum is σ = 629206349152. Its totient is φ = 471904761852.

The previous prime is 550555555481. The next prime is 550555555549. The reversal of 550555555501 is 105555555055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550555555501 - 2⁵ = 550555555469 is a prime.

It is a super-2 number, since 2×550555555501² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550555552501) 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 3 ways as a sum of consecutive naturals, for example, 39325396815 + ... + 39325396828.

It is an arithmetic number, because the mean of its divisors is an integer number (157301587288).

Almost surely, 2^550555555501 is an apocalyptic number.

It is an amenable number.

550555555501 is a deficient number, since it is larger than the sum of its proper divisors (78650793651).

550555555501 is an equidigital number, since it uses as much as digits as its factorization.

550555555501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78650793650.

The product of its (nonzero) digits is 1953125, while the sum is 46.

The spelling of 550555555501 in words is "five hundred fifty billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred one".