138138249967 has 2 divisors, whose sum is σ = 138138249968. Its totient is φ = 138138249966.

The previous prime is 138138249961. The next prime is 138138249983. The reversal of 138138249967 is 769942831831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138138249967 - 2³ = 138138249959 is a prime.

It is a super-2 number, since 2×138138249967² (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 (138138249961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69069124983 + 69069124984.

It is an arithmetic number, because the mean of its divisors is an integer number (69069124984).

Almost surely, 2^138138249967 is an apocalyptic number.

138138249967 is a deficient number, since it is larger than the sum of its proper divisors (1).

138138249967 is an equidigital number, since it uses as much as digits as its factorization.

138138249967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 61.

The spelling of 138138249967 in words is "one hundred thirty-eight billion, one hundred thirty-eight million, two hundred forty-nine thousand, nine hundred sixty-seven".