15720394173 has 48 divisors (see below), whose sum is σ = 25678618560. Its totient is φ = 8495055360.

The previous prime is 15720394169. The next prime is 15720394189. The reversal of 15720394173 is 37149302751.

15720394173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15720394173 - 2² = 15720394169 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15720394133) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 50211 + ... + 184287.

It is an arithmetic number, because the mean of its divisors is an integer number (534971220).

Almost surely, 2^15720394173 is an apocalyptic number.

It is an amenable number.

15720394173 is a deficient number, since it is larger than the sum of its proper divisors (9958224387).

15720394173 is a wasteful number, since it uses less digits than its factorization.

15720394173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134138 (or 134127 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 15720394173 in words is "fifteen billion, seven hundred twenty million, three hundred ninety-four thousand, one hundred seventy-three".