138668437753 has 4 divisors (see below), whose sum is σ = 144697500288. Its totient is φ = 132639375220.

The previous prime is 138668437711. The next prime is 138668437909. The reversal of 138668437753 is 357734866831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138668437753 - 2⁹ = 138668437241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138668437691 and 138668437700.

It is not an unprimeable number, because it can be changed into a prime (138668437153) 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, 3014531233 + ... + 3014531278.

It is an arithmetic number, because the mean of its divisors is an integer number (36174375072).

Almost surely, 2^138668437753 is an apocalyptic number.

It is an amenable number.

138668437753 is a deficient number, since it is larger than the sum of its proper divisors (6029062535).

138668437753 is an equidigital number, since it uses as much as digits as its factorization.

138668437753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029062534.

The product of its digits is 60963840, while the sum is 61.

The spelling of 138668437753 in words is "one hundred thirty-eight billion, six hundred sixty-eight million, four hundred thirty-seven thousand, seven hundred fifty-three".