171799640403 has 16 divisors (see below), whose sum is σ = 241234990080. Its totient is φ = 108454326624.

The previous prime is 171799640377. The next prime is 171799640407. The reversal of 171799640403 is 304046997171.

It is not a de Polignac number, because 171799640403 - 2¹⁷ = 171799509331 is a prime.

It is a super-2 number, since 2×171799640403² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171799640407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581076 + ... + 825377.

It is an arithmetic number, because the mean of its divisors is an integer number (15077186880).

Almost surely, 2^171799640403 is an apocalyptic number.

171799640403 is a deficient number, since it is larger than the sum of its proper divisors (69435349677).

171799640403 is a wasteful number, since it uses less digits than its factorization.

171799640403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408618.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 171799640403 in words is "one hundred seventy-one billion, seven hundred ninety-nine million, six hundred forty thousand, four hundred three".