501136456856721 has 24 divisors (see below), whose sum is σ = 818181970382880. Its totient is φ = 271291916492352.

The previous prime is 501136456856713. The next prime is 501136456856729. The reversal of 501136456856721 is 127658654631105.

It is an interprime number because it is at equal distance from previous prime (501136456856713) and next prime (501136456856729).

It is not a de Polignac number, because 501136456856721 - 2³ = 501136456856713 is a prime.

It is a super-2 number, since 2×501136456856721² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (501136456856729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89712932556 + ... + 89712938141.

It is an arithmetic number, because the mean of its divisors is an integer number (34090915432620).

Almost surely, 2^{501136456856721} is an apocalyptic number.

It is an amenable number.

501136456856721 is a deficient number, since it is larger than the sum of its proper divisors (317045513526159).

501136456856721 is a wasteful number, since it uses less digits than its factorization.

501136456856721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179425870733 (or 179425870726 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 60.

The spelling of 501136456856721 in words is "five hundred one trillion, one hundred thirty-six billion, four hundred fifty-six million, eight hundred fifty-six thousand, seven hundred twenty-one".