138848722255525 has 6 divisors (see below), whose sum is σ = 172172415596882. Its totient is φ = 111078977804400.

The previous prime is 138848722255493. The next prime is 138848722255543. The reversal of 138848722255525 is 525552227848831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5720716807204 + 133128005448321 = 2391802^2 + 11538111^2 .

It is not a de Polignac number, because 138848722255525 - 2⁵ = 138848722255493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2776974445086 + ... + 2776974445135.

Almost surely, 2^{138848722255525} is an apocalyptic number.

It is an amenable number.

138848722255525 is a deficient number, since it is larger than the sum of its proper divisors (33323693341357).

138848722255525 is an equidigital number, since it uses as much as digits as its factorization.

138848722255525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553948890231 (or 5553948890226 counting only the distinct ones).

The product of its digits is 430080000, while the sum is 67.

The spelling of 138848722255525 in words is "one hundred thirty-eight trillion, eight hundred forty-eight billion, seven hundred twenty-two million, two hundred fifty-five thousand, five hundred twenty-five".