138805288901 has 2 divisors, whose sum is σ = 138805288902. Its totient is φ = 138805288900.

The previous prime is 138805288889. The next prime is 138805288961. The reversal of 138805288901 is 109882508831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78854256100 + 59951032801 = 280810^2 + 244849^2 .

It is a cyclic number.

It is not a de Polignac number, because 138805288901 - 2¹⁰ = 138805287877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138805288961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69402644450 + 69402644451.

It is an arithmetic number, because the mean of its divisors is an integer number (69402644451).

Almost surely, 2^138805288901 is an apocalyptic number.

It is an amenable number.

138805288901 is a deficient number, since it is larger than the sum of its proper divisors (1).

138805288901 is an equidigital number, since it uses as much as digits as its factorization.

138805288901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 138805288901 in words is "one hundred thirty-eight billion, eight hundred five million, two hundred eighty-eight thousand, nine hundred one".