5538939993 has 6 divisors (see below), whose sum is σ = 8000691114. Its totient is φ = 3692626656.

The previous prime is 5538939947. The next prime is 5538940013. The reversal of 5538939993 is 3999398355.

5538939993 is a `hidden beast` number, since 5 + 538 + 9 + 3 + 9 + 9 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4133589849 + 1405350144 = 64293^2 + 37488^2 .

It is not a de Polignac number, because 5538939993 - 2⁶ = 5538939929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5538939993.

It is not an unprimeable number, because it can be changed into a prime (5538939943) 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 5 ways as a sum of consecutive naturals, for example, 307718880 + ... + 307718897.

It is an arithmetic number, because the mean of its divisors is an integer number (1333448519).

Almost surely, 2^5538939993 is an apocalyptic number.

It is an amenable number.

5538939993 is a deficient number, since it is larger than the sum of its proper divisors (2461751121).

5538939993 is a wasteful number, since it uses less digits than its factorization.

5538939993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615437783 (or 615437780 counting only the distinct ones).

The product of its digits is 35429400, while the sum is 63.

The square root of 5538939993 is about 74424.0552039460. The cubic root of 5538939993 is about 1769.3301851276.

The spelling of 5538939993 in words is "five billion, five hundred thirty-eight million, nine hundred thirty-nine thousand, nine hundred ninety-three".