2123646463273 has 2 divisors, whose sum is σ = 2123646463274. Its totient is φ = 2123646463272.

The previous prime is 2123646463259. The next prime is 2123646463277. The reversal of 2123646463273 is 3723646463212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1759371446569 + 364275016704 = 1326413^2 + 603552^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123646463273 - 2⁹ = 2123646462761 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123646463277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061823231636 + 1061823231637.

It is an arithmetic number, because the mean of its divisors is an integer number (1061823231637).

Almost surely, 2^{2123646463273} is an apocalyptic number.

It is an amenable number.

2123646463273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123646463273 is an equidigital number, since it uses as much as digits as its factorization.

2123646463273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 49.

The spelling of 2123646463273 in words is "two trillion, one hundred twenty-three billion, six hundred forty-six million, four hundred sixty-three thousand, two hundred seventy-three".