173009899790321 has 4 divisors (see below), whose sum is σ = 188738072498544. Its totient is φ = 157281727082100.

The previous prime is 173009899790309. The next prime is 173009899790363. The reversal of 173009899790321 is 123097998900371.

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 173009899790321 - 2¹⁰ = 173009899789297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173009899190321) 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, 7864086354095 + ... + 7864086354116.

It is an arithmetic number, because the mean of its divisors is an integer number (47184518124636).

Almost surely, 2^{173009899790321} is an apocalyptic number.

173009899790321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

173009899790321 is a deficient number, since it is larger than the sum of its proper divisors (15728172708223).

173009899790321 is a wasteful number, since it uses less digits than its factorization.

173009899790321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15728172708222.

The product of its (nonzero) digits is 46294416, while the sum is 68.

The spelling of 173009899790321 in words is "one hundred seventy-three trillion, nine billion, eight hundred ninety-nine million, seven hundred ninety thousand, three hundred twenty-one".