173504385138 has 32 divisors (see below), whose sum is σ = 398956207104. Its totient is φ = 49275837072.

The previous prime is 173504385107. The next prime is 173504385179. The reversal of 173504385138 is 831583405371.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12361420 + ... + 12375447.

It is an arithmetic number, because the mean of its divisors is an integer number (12467381472).

Almost surely, 2^173504385138 is an apocalyptic number.

173504385138 is an abundant number, since it is smaller than the sum of its proper divisors (225451821966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

173504385138 is a wasteful number, since it uses less digits than its factorization.

173504385138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24737046.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 173504385138 in words is "one hundred seventy-three billion, five hundred four million, three hundred eighty-five thousand, one hundred thirty-eight".