138249369789 has 32 divisors (see below), whose sum is σ = 189544126464. Its totient is φ = 89582243520.

The previous prime is 138249369781. The next prime is 138249369803. The reversal of 138249369789 is 987963942831.

It is not a de Polignac number, because 138249369789 - 2³ = 138249369781 is a prime.

It is a super-2 number, since 2×138249369789² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138249369781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43323184 + ... + 43326374.

It is an arithmetic number, because the mean of its divisors is an integer number (5923253952).

Almost surely, 2^138249369789 is an apocalyptic number.

It is an amenable number.

138249369789 is a deficient number, since it is larger than the sum of its proper divisors (51294756675).

138249369789 is a wasteful number, since it uses less digits than its factorization.

138249369789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

The product of its digits is 141087744, while the sum is 69.

The spelling of 138249369789 in words is "one hundred thirty-eight billion, two hundred forty-nine million, three hundred sixty-nine thousand, seven hundred eighty-nine".