50643075721 has 8 divisors (see below), whose sum is σ = 59223796544. Its totient is φ = 42398853840.

The previous prime is 50643075713. The next prime is 50643075767. The reversal of 50643075721 is 12757034605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50643075721 - 2³ = 50643075713 is a prime.

It is a super-2 number, since 2×50643075721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50643073721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84124410 + ... + 84125011.

It is an arithmetic number, because the mean of its divisors is an integer number (7402974568).

Almost surely, 2^50643075721 is an apocalyptic number.

It is an amenable number.

50643075721 is a deficient number, since it is larger than the sum of its proper divisors (8580720823).

50643075721 is a wasteful number, since it uses less digits than its factorization.

50643075721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168249471.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 50643075721 in words is "fifty billion, six hundred forty-three million, seventy-five thousand, seven hundred twenty-one".