172843863361 has 4 divisors (see below), whose sum is σ = 186139545172. Its totient is φ = 159548181552.

The previous prime is 172843863337. The next prime is 172843863391. The reversal of 172843863361 is 163368348271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115366198336 + 57477665025 = 339656^2 + 239745^2 .

It is a cyclic number.

It is not a de Polignac number, because 172843863361 - 2²⁵ = 172810308929 is a prime.

It is a super-2 number, since 2×172843863361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172843863299 and 172843863308.

It is not an unprimeable number, because it can be changed into a prime (172843863331) 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, 6647840886 + ... + 6647840911.

It is an arithmetic number, because the mean of its divisors is an integer number (46534886293).

Almost surely, 2^172843863361 is an apocalyptic number.

It is an amenable number.

172843863361 is a deficient number, since it is larger than the sum of its proper divisors (13295681811).

172843863361 is a wasteful number, since it uses less digits than its factorization.

172843863361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13295681810.

The product of its digits is 3483648, while the sum is 52.

The spelling of 172843863361 in words is "one hundred seventy-two billion, eight hundred forty-three million, eight hundred sixty-three thousand, three hundred sixty-one".