4138693865531 has 2 divisors, whose sum is σ = 4138693865532. Its totient is φ = 4138693865530.

The previous prime is 4138693865513. The next prime is 4138693865549. The reversal of 4138693865531 is 1355683968314.

It is a happy number.

4138693865531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (4138693865513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (4138693865513) and next prime (4138693865549).

It is a cyclic number.

It is not a de Polignac number, because 4138693865531 - 2¹⁰ = 4138693864507 is a prime.

It is a super-2 number, since 2×4138693865531² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4138693865561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069346932765 + 2069346932766.

It is an arithmetic number, because the mean of its divisors is an integer number (2069346932766).

Almost surely, 2^{4138693865531} is an apocalyptic number.

4138693865531 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138693865531 is an equidigital number, since it uses as much as digits as its factorization.

4138693865531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55987200, while the sum is 62.

The spelling of 4138693865531 in words is "four trillion, one hundred thirty-eight billion, six hundred ninety-three million, eight hundred sixty-five thousand, five hundred thirty-one".