138240969042877 has 2 divisors, whose sum is σ = 138240969042878. Its totient is φ = 138240969042876.

The previous prime is 138240969042821. The next prime is 138240969042931. The reversal of 138240969042877 is 778240969042831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138237136690041 + 3832352836 = 11757429^2 + 61906^2 .

It is a cyclic number.

It is not a de Polignac number, because 138240969042877 - 2³⁵ = 138206609304509 is a prime.

It is a super-2 number, since 2×138240969042877² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138240969042377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69120484521438 + 69120484521439.

It is an arithmetic number, because the mean of its divisors is an integer number (69120484521439).

Almost surely, 2^{138240969042877} is an apocalyptic number.

It is an amenable number.

138240969042877 is a deficient number, since it is larger than the sum of its proper divisors (1).

138240969042877 is an equidigital number, since it uses as much as digits as its factorization.

138240969042877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 292626432, while the sum is 70.

The spelling of 138240969042877 in words is "one hundred thirty-eight trillion, two hundred forty billion, nine hundred sixty-nine million, forty-two thousand, eight hundred seventy-seven".