39138649575913 has 2 divisors, whose sum is σ = 39138649575914. Its totient is φ = 39138649575912.

The previous prime is 39138649575791. The next prime is 39138649575937. The reversal of 39138649575913 is 31957594683193.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22795735662144 + 16342913913769 = 4774488^2 + 4042637^2 .

It is an emirp because it is prime and its reverse (31957594683193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39138649575913 - 2³⁷ = 39001210622441 is a prime.

It is a super-2 number, since 2×39138649575913² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39138649570913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569324787956 + 19569324787957.

It is an arithmetic number, because the mean of its divisors is an integer number (19569324787957).

Almost surely, 2^{39138649575913} is an apocalyptic number.

It is an amenable number.

39138649575913 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138649575913 is an equidigital number, since it uses as much as digits as its factorization.

39138649575913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 661348800, while the sum is 73.

The spelling of 39138649575913 in words is "thirty-nine trillion, one hundred thirty-eight billion, six hundred forty-nine million, five hundred seventy-five thousand, nine hundred thirteen".