138756172723071 has 8 divisors (see below), whose sum is σ = 194745505576320. Its totient is φ = 87635477509272.

The previous prime is 138756172723067. The next prime is 138756172723151. The reversal of 138756172723071 is 170327271657831.

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

It is not a de Polignac number, because 138756172723071 - 2² = 138756172723067 is a prime.

It is a super-2 number, since 2×138756172723071² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138756172722996 and 138756172723014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138756172728071) 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, 1217159409795 + ... + 1217159409908.

It is an arithmetic number, because the mean of its divisors is an integer number (24343188197040).

Almost surely, 2^{138756172723071} is an apocalyptic number.

138756172723071 is a deficient number, since it is larger than the sum of its proper divisors (55989332853249).

138756172723071 is a wasteful number, since it uses less digits than its factorization.

138756172723071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434318819725.

The product of its (nonzero) digits is 20744640, while the sum is 60.

The spelling of 138756172723071 in words is "one hundred thirty-eight trillion, seven hundred fifty-six billion, one hundred seventy-two million, seven hundred twenty-three thousand, seventy-one".