501211340144 has 20 divisors (see below), whose sum is σ = 975374938824. Its totient is φ = 249501678528.

The previous prime is 501211340143. The next prime is 501211340173. The reversal of 501211340144 is 441043112105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501211340143) 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, 68995727 + ... + 69002990.

Almost surely, 2^501211340144 is an apocalyptic number.

It is an amenable number.

501211340144 is a deficient number, since it is larger than the sum of its proper divisors (474163598680).

501211340144 is a wasteful number, since it uses less digits than its factorization.

501211340144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137998952 (or 137998946 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 501211340144 its reverse (441043112105), we get a palindrome (942254452249).

The spelling of 501211340144 in words is "five hundred one billion, two hundred eleven million, three hundred forty thousand, one hundred forty-four".