2172394723463 has 4 divisors (see below), whose sum is σ = 2218615887840. Its totient is φ = 2126173559088.

The previous prime is 2172394723439. The next prime is 2172394723469. The reversal of 2172394723463 is 3643274932712.

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

It is a cyclic number.

It is not a de Polignac number, because 2172394723463 - 2¹⁰ = 2172394722439 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 (2172394723469) 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, 23110582118 + ... + 23110582211.

It is an arithmetic number, because the mean of its divisors is an integer number (554653971960).

Almost surely, 2^{2172394723463} is an apocalyptic number.

2172394723463 is a deficient number, since it is larger than the sum of its proper divisors (46221164377).

2172394723463 is an equidigital number, since it uses as much as digits as its factorization.

2172394723463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46221164376.

The product of its digits is 9144576, while the sum is 53.

The spelling of 2172394723463 in words is "two trillion, one hundred seventy-two billion, three hundred ninety-four million, seven hundred twenty-three thousand, four hundred sixty-three".