500000009550 has 48 divisors (see below), whose sum is σ = 1293913077120. Its totient is φ = 127536233440.

The previous prime is 500000009549. The next prime is 500000009627. The reversal of 500000009550 is 55900000005.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 500000009550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72460320 + ... + 72467219.

It is an arithmetic number, because the mean of its divisors is an integer number (26956522440).

Almost surely, 2^500000009550 is an apocalyptic number.

500000009550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

500000009550 is an abundant number, since it is smaller than the sum of its proper divisors (793913067570).

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

500000009550 is a wasteful number, since it uses less digits than its factorization.

500000009550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144927577 (or 144927572 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 24.

Adding to 500000009550 its reverse (55900000005), we get a palindrome (555900009555).

The spelling of 500000009550 in words is "five hundred billion, nine thousand, five hundred fifty".