2145105266173 has 4 divisors (see below), whose sum is σ = 2258005543360. Its totient is φ = 2032204988988.

The previous prime is 2145105266167. The next prime is 2145105266177. The reversal of 2145105266173 is 3716625015412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145105266173 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 (2145105266177) 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, 56450138565 + ... + 56450138602.

It is an arithmetic number, because the mean of its divisors is an integer number (564501385840).

Almost surely, 2^{2145105266173} is an apocalyptic number.

It is an amenable number.

2145105266173 is a deficient number, since it is larger than the sum of its proper divisors (112900277187).

2145105266173 is a wasteful number, since it uses less digits than its factorization.

2145105266173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112900277186.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 2145105266173 in words is "two trillion, one hundred forty-five billion, one hundred five million, two hundred sixty-six thousand, one hundred seventy-three".