501278000240 has 20 divisors (see below), whose sum is σ = 1165471350744. Its totient is φ = 200511200064.

The previous prime is 501278000219. The next prime is 501278000243. The reversal of 501278000240 is 42000872105.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×501278000240² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501278000243) 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, 3132987422 + ... + 3132987581.

Almost surely, 2^501278000240 is an apocalyptic number.

It is an amenable number.

501278000240 is an abundant number, since it is smaller than the sum of its proper divisors (664193350504).

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

501278000240 is a wasteful number, since it uses less digits than its factorization.

501278000240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265975016 (or 6265975010 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 501278000240 its reverse (42000872105), we get a palindrome (543278872345).

The spelling of 501278000240 in words is "five hundred one billion, two hundred seventy-eight million, two hundred forty", and thus it is an aban number.