501322873842 has 162 divisors, whose sum is σ = 1313556830703. Its totient is φ = 143072892648.

The previous prime is 501322873813. The next prime is 501322873867. The reversal of 501322873842 is 248378223105.

501322873842 is a `hidden beast` number, since 501 + 3 + 22 + 87 + 3 + 8 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 250661436921 + 250661436921 = 500661^2 + 500661^2 .

It is a tau number, because it is divible by the number of its divisors (162).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=500661.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 567749133 + ... + 567750015.

Almost surely, 2^501322873842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501322873842

501322873842 is an abundant number, since it is smaller than the sum of its proper divisors (812233956861).

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

501322873842 is an frugal number, since it uses more digits than its factorization.

501322873842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 501322873842 in words is "five hundred one billion, three hundred twenty-two million, eight hundred seventy-three thousand, eight hundred forty-two".