138249719677 has 8 divisors (see below), whose sum is σ = 143252582400. Its totient is φ = 133262565744.

The previous prime is 138249719669. The next prime is 138249719683. The reversal of 138249719677 is 776917942831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138249719677 - 2³ = 138249719669 is a prime.

It is a super-2 number, since 2×138249719677² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138249719977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3909277 + ... + 3944482.

It is an arithmetic number, because the mean of its divisors is an integer number (17906572800).

Almost surely, 2^138249719677 is an apocalyptic number.

It is an amenable number.

138249719677 is a deficient number, since it is larger than the sum of its proper divisors (5002862723).

138249719677 is an equidigital number, since it uses as much as digits as its factorization.

138249719677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854395.

The product of its digits is 32006016, while the sum is 64.

The spelling of 138249719677 in words is "one hundred thirty-eight billion, two hundred forty-nine million, seven hundred nineteen thousand, six hundred seventy-seven".