138276837709 has 2 divisors, whose sum is σ = 138276837710. Its totient is φ = 138276837708.

The previous prime is 138276837703. The next prime is 138276837731. The reversal of 138276837709 is 907738672831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75377702500 + 62899135209 = 274550^2 + 250797^2 .

It is a cyclic number.

It is not a de Polignac number, because 138276837709 - 2¹¹ = 138276835661 is a prime.

It is a super-2 number, since 2×138276837709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138276837703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138418854 + 69138418855.

It is an arithmetic number, because the mean of its divisors is an integer number (69138418855).

Almost surely, 2^138276837709 is an apocalyptic number.

It is an amenable number.

138276837709 is a deficient number, since it is larger than the sum of its proper divisors (1).

138276837709 is an equidigital number, since it uses as much as digits as its factorization.

138276837709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 138276837709 in words is "one hundred thirty-eight billion, two hundred seventy-six million, eight hundred thirty-seven thousand, seven hundred nine".