50808721921 has 8 divisors (see below), whose sum is σ = 53484994400. Its totient is φ = 48132662400.

The previous prime is 50808721919. The next prime is 50808721927. The reversal of 50808721921 is 12912780805.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 50808721921 - 2¹ = 50808721919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50808721927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738646 + ... + 804496.

It is an arithmetic number, because the mean of its divisors is an integer number (6685624300).

Almost surely, 2^50808721921 is an apocalyptic number.

It is an amenable number.

50808721921 is a deficient number, since it is larger than the sum of its proper divisors (2676272479).

50808721921 is a wasteful number, since it uses less digits than its factorization.

50808721921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106479.

The product of its (nonzero) digits is 80640, while the sum is 43.

The spelling of 50808721921 in words is "fifty billion, eight hundred eight million, seven hundred twenty-one thousand, nine hundred twenty-one".