6938820138825 has 24 divisors (see below), whose sum is σ = 12746869589600. Its totient is φ = 3700704073680.

The previous prime is 6938820138779. The next prime is 6938820138851. The reversal of 6938820138825 is 5288310288396.

It is not a de Polignac number, because 6938820138825 - 2⁷ = 6938820138697 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5139866095 + ... + 5139867444.

Almost surely, 2^{6938820138825} is an apocalyptic number.

It is an amenable number.

6938820138825 is a deficient number, since it is larger than the sum of its proper divisors (5808049450775).

6938820138825 is a wasteful number, since it uses less digits than its factorization.

6938820138825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10279733558 (or 10279733547 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 6938820138825 in words is "six trillion, nine hundred thirty-eight billion, eight hundred twenty million, one hundred thirty-eight thousand, eight hundred twenty-five".