50990838993 has 12 divisors (see below), whose sum is σ = 73655424388. Its totient is φ = 33992974080.

The previous prime is 50990838991. The next prime is 50990839013. The reversal of 50990838993 is 39983809905.

50990838993 is a `hidden beast` number, since 509 + 9 + 0 + 8 + 38 + 9 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2312359569 + 48678479424 = 48087^2 + 220632^2 .

It is not a de Polignac number, because 50990838993 - 2¹ = 50990838991 is a prime.

It is a super-2 number, since 2×50990838993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50990838993.

It is not an unprimeable number, because it can be changed into a prime (50990838991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518313 + ... + 608793.

Almost surely, 2^50990838993 is an apocalyptic number.

It is an amenable number.

50990838993 is a deficient number, since it is larger than the sum of its proper divisors (22664585395).

50990838993 is a wasteful number, since it uses less digits than its factorization.

50990838993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153104 (or 153101 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The spelling of 50990838993 in words is "fifty billion, nine hundred ninety million, eight hundred thirty-eight thousand, nine hundred ninety-three".