501005545550 has 12 divisors (see below), whose sum is σ = 931870314816. Its totient is φ = 200402218200.

The previous prime is 501005545549. The next prime is 501005545553. The reversal of 501005545550 is 55545500105.

It is a happy number.

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 501005545550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501005545553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5010055406 + ... + 5010055505.

It is an arithmetic number, because the mean of its divisors is an integer number (77655859568).

Almost surely, 2^501005545550 is an apocalyptic number.

501005545550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

501005545550 is a deficient number, since it is larger than the sum of its proper divisors (430864769266).

501005545550 is a wasteful number, since it uses less digits than its factorization.

501005545550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020110923 (or 10020110918 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 35.

The spelling of 501005545550 in words is "five hundred one billion, five million, five hundred forty-five thousand, five hundred fifty".