501561666050 has 24 divisors (see below), whose sum is σ = 933759891792. Its totient is φ = 200440754000.

The previous prime is 501561666049. The next prime is 501561666079. The reversal of 501561666050 is 50666165105.

It is a junction number, because it is equal to n+sod(n) for n = 501561665989 and 501561666007.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4542716 + ... + 4651815.

It is an arithmetic number, because the mean of its divisors is an integer number (38906662158).

Almost surely, 2^501561666050 is an apocalyptic number.

501561666050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

501561666050 is a deficient number, since it is larger than the sum of its proper divisors (432198225742).

501561666050 is a wasteful number, since it uses less digits than its factorization.

501561666050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9195634 (or 9195629 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

It can be divided in two parts, 501561 and 666050, that added together give a palindrome (1167611).

The spelling of 501561666050 in words is "five hundred one billion, five hundred sixty-one million, six hundred sixty-six thousand, fifty".