2145654323205 has 16 divisors (see below), whose sum is σ = 3434315193024. Its totient is φ = 1143926213760.

The previous prime is 2145654323173. The next prime is 2145654323243. The reversal of 2145654323205 is 5023234565412.

It is not a de Polignac number, because 2145654323205 - 2⁵ = 2145654323173 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26380456 + ... + 26461665.

It is an arithmetic number, because the mean of its divisors is an integer number (214644699564).

Almost surely, 2^{2145654323205} is an apocalyptic number.

It is an amenable number.

2145654323205 is a deficient number, since it is larger than the sum of its proper divisors (1288660869819).

2145654323205 is a wasteful number, since it uses less digits than its factorization.

2145654323205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52844836.

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 2145654323205 its reverse (5023234565412), we get a palindrome (7168888888617).

The spelling of 2145654323205 in words is "two trillion, one hundred forty-five billion, six hundred fifty-four million, three hundred twenty-three thousand, two hundred five".