138138250007 has 2 divisors, whose sum is σ = 138138250008. Its totient is φ = 138138250006.

The previous prime is 138138249983. The next prime is 138138250067. The reversal of 138138250007 is 700052831831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138138250007 - 2⁶ = 138138249943 is a prime.

It is a super-2 number, since 2×138138250007² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138138250067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69069125003 + 69069125004.

It is an arithmetic number, because the mean of its divisors is an integer number (69069125004).

Almost surely, 2^138138250007 is an apocalyptic number.

138138250007 is a deficient number, since it is larger than the sum of its proper divisors (1).

138138250007 is an equidigital number, since it uses as much as digits as its factorization.

138138250007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 138138250007 in words is "one hundred thirty-eight billion, one hundred thirty-eight million, two hundred fifty thousand, seven".