138628887071 has 2 divisors, whose sum is σ = 138628887072. Its totient is φ = 138628887070.

The previous prime is 138628887053. The next prime is 138628887149. The reversal of 138628887071 is 170788826831.

138628887071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138628887071 - 2¹⁴ = 138628870687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138628887071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138628887041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69314443535 + 69314443536.

It is an arithmetic number, because the mean of its divisors is an integer number (69314443536).

Almost surely, 2^138628887071 is an apocalyptic number.

138628887071 is a deficient number, since it is larger than the sum of its proper divisors (1).

138628887071 is an equidigital number, since it uses as much as digits as its factorization.

138628887071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7225344, while the sum is 59.

The spelling of 138628887071 in words is "one hundred thirty-eight billion, six hundred twenty-eight million, eight hundred eighty-seven thousand, seventy-one".