39138271349761 has 4 divisors (see below), whose sum is σ = 39138795693652. Its totient is φ = 39137747005872.

The previous prime is 39138271349741. The next prime is 39138271349869. The reversal of 39138271349761 is 16794317283193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32304229709761 + 6834041640000 = 5683681^2 + 2614200^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138271349761 - 2⁵ = 39138271349729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39138271349693 and 39138271349702.

It is not an unprimeable number, because it can be changed into a prime (39138271349701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262059966 + ... + 262209271.

It is an arithmetic number, because the mean of its divisors is an integer number (9784698923413).

Almost surely, 2^{39138271349761} is an apocalyptic number.

It is an amenable number.

39138271349761 is a deficient number, since it is larger than the sum of its proper divisors (524343891).

39138271349761 is an equidigital number, since it uses as much as digits as its factorization.

39138271349761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524343890.

The product of its digits is 41150592, while the sum is 64.

The spelling of 39138271349761 in words is "thirty-nine trillion, one hundred thirty-eight billion, two hundred seventy-one million, three hundred forty-nine thousand, seven hundred sixty-one".