138063583251949 has 2 divisors, whose sum is σ = 138063583251950. Its totient is φ = 138063583251948.

The previous prime is 138063583251947. The next prime is 138063583251973. The reversal of 138063583251949 is 949152385360831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70671091692100 + 67392491559849 = 8406610^2 + 8209293^2 .

It is a cyclic number.

It is not a de Polignac number, because 138063583251949 - 2¹ = 138063583251947 is a prime.

Together with 138063583251947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138063583251943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69031791625974 + 69031791625975.

It is an arithmetic number, because the mean of its divisors is an integer number (69031791625975).

Almost surely, 2^{138063583251949} is an apocalyptic number.

It is an amenable number.

138063583251949 is a deficient number, since it is larger than the sum of its proper divisors (1).

138063583251949 is an equidigital number, since it uses as much as digits as its factorization.

138063583251949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 167961600, while the sum is 67.

The spelling of 138063583251949 in words is "one hundred thirty-eight trillion, sixty-three billion, five hundred eighty-three million, two hundred fifty-one thousand, nine hundred forty-nine".