138188195007 has 4 divisors (see below), whose sum is σ = 184250926680. Its totient is φ = 92125463336.

The previous prime is 138188194981. The next prime is 138188195027. The reversal of 138188195007 is 700591881831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138188195007 - 2¹² = 138188190911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138188195027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23031365832 + ... + 23031365837.

It is an arithmetic number, because the mean of its divisors is an integer number (46062731670).

Almost surely, 2^138188195007 is an apocalyptic number.

138188195007 is a deficient number, since it is larger than the sum of its proper divisors (46062731673).

138188195007 is an equidigital number, since it uses as much as digits as its factorization.

138188195007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46062731672.

The product of its (nonzero) digits is 483840, while the sum is 51.

The spelling of 138188195007 in words is "one hundred thirty-eight billion, one hundred eighty-eight million, one hundred ninety-five thousand, seven".