138755550125 has 32 divisors (see below), whose sum is σ = 175386837600. Its totient is φ = 109585344000.

The previous prime is 138755550103. The next prime is 138755550127. The reversal of 138755550125 is 521055557831.

It can be written as a sum of positive squares in 16 ways, for example, as 55833436681 + 82922113444 = 236291^2 + 287962^2 .

It is not a de Polignac number, because 138755550125 - 2⁶ = 138755550061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138755550125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138755550127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7344191 + ... + 7363059.

It is an arithmetic number, because the mean of its divisors is an integer number (5480838675).

Almost surely, 2^138755550125 is an apocalyptic number.

It is an amenable number.

138755550125 is a deficient number, since it is larger than the sum of its proper divisors (36631287475).

138755550125 is an equidigital number, since it uses as much as digits as its factorization.

138755550125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19634 (or 19624 counting only the distinct ones).

The product of its (nonzero) digits is 1050000, while the sum is 47.

The spelling of 138755550125 in words is "one hundred thirty-eight billion, seven hundred fifty-five million, five hundred fifty thousand, one hundred twenty-five".