550005555478 has 8 divisors (see below), whose sum is σ = 834278090040. Its totient is φ = 271912858800.

The previous prime is 550005555457. The next prime is 550005555479. The reversal of 550005555478 is 874555500055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×550005555478² (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 (550005555479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544959248 + ... + 1544959603.

It is an arithmetic number, because the mean of its divisors is an integer number (104284761255).

Almost surely, 2^550005555478 is an apocalyptic number.

550005555478 is a deficient number, since it is larger than the sum of its proper divisors (284272534562).

550005555478 is a wasteful number, since it uses less digits than its factorization.

550005555478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089918942.

The product of its (nonzero) digits is 3500000, while the sum is 49.

The spelling of 550005555478 in words is "five hundred fifty billion, five million, five hundred fifty-five thousand, four hundred seventy-eight".