4138693865518 has 32 divisors (see below), whose sum is σ = 6541795180800. Its totient is φ = 1958330514816.

The previous prime is 4138693865513. The next prime is 4138693865531. The reversal of 4138693865518 is 8155683968314.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138693865513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140838655 + ... + 140868037.

It is an arithmetic number, because the mean of its divisors is an integer number (204431099400).

Almost surely, 2^{4138693865518} is an apocalyptic number.

4138693865518 is a deficient number, since it is larger than the sum of its proper divisors (2403101315282).

4138693865518 is a wasteful number, since it uses less digits than its factorization.

4138693865518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33256.

The product of its digits is 149299200, while the sum is 67.

The spelling of 4138693865518 in words is "four trillion, one hundred thirty-eight billion, six hundred ninety-three million, eight hundred sixty-five thousand, five hundred eighteen".