50128899993 has 24 divisors (see below), whose sum is σ = 75725020800. Its totient is φ = 31895001600.

The previous prime is 50128899973. The next prime is 50128900037. The reversal of 50128899993 is 39999882105.

It is not a de Polignac number, because 50128899993 - 2¹³ = 50128891801 is a prime.

It is a super-2 number, since 2×50128899993² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50128899993.

It is not an unprimeable number, because it can be changed into a prime (50128899913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176733 + ... + 362618.

It is an arithmetic number, because the mean of its divisors is an integer number (3155209200).

Almost surely, 2^50128899993 is an apocalyptic number.

It is an amenable number.

50128899993 is a deficient number, since it is larger than the sum of its proper divisors (25596120807).

50128899993 is a wasteful number, since it uses less digits than its factorization.

50128899993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539829 (or 539826 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The spelling of 50128899993 in words is "fifty billion, one hundred twenty-eight million, eight hundred ninety-nine thousand, nine hundred ninety-three".