550023646 has 4 divisors (see below), whose sum is σ = 825035472. Its totient is φ = 275011822.

The previous prime is 550023637. The next prime is 550023673. The reversal of 550023646 is 646320055.

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

It is a super-2 number, since 2×550023646² = 605052022318266632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137505910 + ... + 137505913.

It is an arithmetic number, because the mean of its divisors is an integer number (206258868).

Almost surely, 2^550023646 is an apocalyptic number.

550023646 is a deficient number, since it is larger than the sum of its proper divisors (275011826).

550023646 is a wasteful number, since it uses less digits than its factorization.

550023646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275011825.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 550023646 is about 23452.5829281126. The cubic root of 550023646 is about 819.3330120510. Note that the first 3 decimals are identical.

The spelling of 550023646 in words is "five hundred fifty million, twenty-three thousand, six hundred forty-six".