138206262507 has 8 divisors (see below), whose sum is σ = 184280237376. Its totient is φ = 92134897992.

The previous prime is 138206262487. The next prime is 138206262563. The reversal of 138206262507 is 705262602831.

138206262507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138206262507 - 2¹⁵ = 138206229739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138206262407) 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 in 7 ways as a sum of consecutive naturals, for example, 525513 + ... + 743354.

It is an arithmetic number, because the mean of its divisors is an integer number (23035029672).

Almost surely, 2^138206262507 is an apocalyptic number.

138206262507 is a deficient number, since it is larger than the sum of its proper divisors (46073974869).

138206262507 is a wasteful number, since it uses less digits than its factorization.

138206262507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305177.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 138206262507 in words is "one hundred thirty-eight billion, two hundred six million, two hundred sixty-two thousand, five hundred seven".