50403721857 has 4 divisors (see below), whose sum is σ = 67204962480. Its totient is φ = 33602481236.

The previous prime is 50403721853. The next prime is 50403721871. The reversal of 50403721857 is 75812730405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50403721857 - 2² = 50403721853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50403721853) 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 3 ways as a sum of consecutive naturals, for example, 8400620307 + ... + 8400620312.

It is an arithmetic number, because the mean of its divisors is an integer number (16801240620).

Almost surely, 2^50403721857 is an apocalyptic number.

It is an amenable number.

50403721857 is a deficient number, since it is larger than the sum of its proper divisors (16801240623).

50403721857 is a wasteful number, since it uses less digits than its factorization.

50403721857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16801240622.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 50403721857 in words is "fifty billion, four hundred three million, seven hundred twenty-one thousand, eight hundred fifty-seven".