6538814628993 has 24 divisors (see below), whose sum is σ = 9778832991720. Its totient is φ = 4205363984640.

The previous prime is 6538814628959. The next prime is 6538814629007. The reversal of 6538814628993 is 3998264188356.

It is a happy number.

6538814628993 is a `hidden beast` number, since 6 + 5 + 3 + 8 + 81 + 462 + 89 + 9 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 848357049969 + 5690457579024 = 921063^2 + 2385468^2 .

It is not a de Polignac number, because 6538814628993 - 2⁹ = 6538814628481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6538814628943) 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, 10188598 + ... + 10811343.

It is an arithmetic number, because the mean of its divisors is an integer number (407451374655).

Almost surely, 2^{6538814628993} is an apocalyptic number.

It is an amenable number.

6538814628993 is a deficient number, since it is larger than the sum of its proper divisors (3240018362727).

6538814628993 is a wasteful number, since it uses less digits than its factorization.

6538814628993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21001169 (or 21001166 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 72.

The spelling of 6538814628993 in words is "six trillion, five hundred thirty-eight billion, eight hundred fourteen million, six hundred twenty-eight thousand, nine hundred ninety-three".