501661001140 has 48 divisors (see below), whose sum is σ = 1171123269120. Its totient is φ = 179253555840.

The previous prime is 501661001137. The next prime is 501661001209. The reversal of 501661001140 is 41100166105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31112350 + ... + 31128469.

It is an arithmetic number, because the mean of its divisors is an integer number (24398401440).

Almost surely, 2^501661001140 is an apocalyptic number.

It is an amenable number.

501661001140 is an abundant number, since it is smaller than the sum of its proper divisors (669462267980).

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

501661001140 is a wasteful number, since it uses less digits than its factorization.

501661001140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62240872 (or 62240870 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 501661001140 its reverse (41100166105), we get a palindrome (542761167245).

The spelling of 501661001140 in words is "five hundred one billion, six hundred sixty-one million, one thousand, one hundred forty".