501442644113 has 4 divisors (see below), whose sum is σ = 513672952548. Its totient is φ = 489212335680.

The previous prime is 501442644097. The next prime is 501442644121. The reversal of 501442644113 is 311446244105.

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

It can be written as a sum of positive squares in 2 ways, for example, as 269327785024 + 232114859089 = 518968^2 + 481783^2 .

It is a cyclic number.

It is not a de Polignac number, because 501442644113 - 2⁴ = 501442644097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501442644173) 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, 6115154156 + ... + 6115154237.

It is an arithmetic number, because the mean of its divisors is an integer number (128418238137).

Almost surely, 2^501442644113 is an apocalyptic number.

It is an amenable number.

501442644113 is a deficient number, since it is larger than the sum of its proper divisors (12230308435).

501442644113 is a wasteful number, since it uses less digits than its factorization.

501442644113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230308434.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 501442644113 its reverse (311446244105), we get a palindrome (812888888218).

The spelling of 501442644113 in words is "five hundred one billion, four hundred forty-two million, six hundred forty-four thousand, one hundred thirteen".