170723120138 has 16 divisors (see below), whose sum is σ = 261008446176. Its totient is φ = 83721440400.

The previous prime is 170723120129. The next prime is 170723120149. The reversal of 170723120138 is 831021327071.

170723120138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×170723120138² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 170723120098 and 170723120107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19745 + ... + 584667.

It is an arithmetic number, because the mean of its divisors is an integer number (16313027886).

Almost surely, 2^170723120138 is an apocalyptic number.

170723120138 is a deficient number, since it is larger than the sum of its proper divisors (90285326038).

170723120138 is a wasteful number, since it uses less digits than its factorization.

170723120138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567829.

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 170723120138 in words is "one hundred seventy billion, seven hundred twenty-three million, one hundred twenty thousand, one hundred thirty-eight".