12173764643573 has 16 divisors (see below), whose sum is σ = 13193121868080. Its totient is φ = 11232772192512.

The previous prime is 12173764643501. The next prime is 12173764643609. The reversal of 12173764643573 is 37534646737121.

It can be written as a sum of positive squares in 8 ways, for example, as 5831944863364 + 6341819780209 = 2414942^2 + 2518297^2 .

It is not a de Polignac number, because 12173764643573 - 2¹⁶ = 12173764578037 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 (12173764643473) 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, 4312865 + ... + 6553497.

It is an arithmetic number, because the mean of its divisors is an integer number (824570116755).

Almost surely, 2^{12173764643573} is an apocalyptic number.

12173764643573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12173764643573 is a deficient number, since it is larger than the sum of its proper divisors (1019357224507).

12173764643573 is an equidigital number, since it uses as much as digits as its factorization.

12173764643573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243145 (or 2243119 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 59.

The spelling of 12173764643573 in words is "twelve trillion, one hundred seventy-three billion, seven hundred sixty-four million, six hundred forty-three thousand, five hundred seventy-three".