172320381583 has 8 divisors (see below), whose sum is σ = 196957045760. Its totient is φ = 147688584120.

The previous prime is 172320381581. The next prime is 172320381613. The reversal of 172320381583 is 385183023271.

It is a happy number.

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

It is not a de Polignac number, because 172320381583 - 2¹ = 172320381581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172320381581) 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, 1140483 + ... + 1282708.

It is an arithmetic number, because the mean of its divisors is an integer number (24619630720).

Almost surely, 2^172320381583 is an apocalyptic number.

172320381583 is a deficient number, since it is larger than the sum of its proper divisors (24636664177).

172320381583 is a wasteful number, since it uses less digits than its factorization.

172320381583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433357.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 172320381583 in words is "one hundred seventy-two billion, three hundred twenty million, three hundred eighty-one thousand, five hundred eighty-three".