138967561241 has 4 divisors (see below), whose sum is σ = 139240582500. Its totient is φ = 138694539984.

The previous prime is 138967561237. The next prime is 138967561253. The reversal of 138967561241 is 142165769831.

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 121535904400 + 17431656841 = 348620^2 + 132029^2 .

It is a cyclic number.

It is not a de Polignac number, because 138967561241 - 2² = 138967561237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138967561231) 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, 136509866 + ... + 136510883.

It is an arithmetic number, because the mean of its divisors is an integer number (34810145625).

Almost surely, 2^138967561241 is an apocalyptic number.

It is an amenable number.

138967561241 is a deficient number, since it is larger than the sum of its proper divisors (273021259).

138967561241 is an equidigital number, since it uses as much as digits as its factorization.

138967561241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273021258.

The product of its digits is 2177280, while the sum is 53.

The spelling of 138967561241 in words is "one hundred thirty-eight billion, nine hundred sixty-seven million, five hundred sixty-one thousand, two hundred forty-one".