2161453603123 has 2 divisors, whose sum is σ = 2161453603124. Its totient is φ = 2161453603122.

The previous prime is 2161453603103. The next prime is 2161453603151. The reversal of 2161453603123 is 3213063541612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161453603123 - 2⁹ = 2161453602611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2161453603103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080726801561 + 1080726801562.

It is an arithmetic number, because the mean of its divisors is an integer number (1080726801562).

Almost surely, 2^{2161453603123} is an apocalyptic number.

2161453603123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161453603123 is an equidigital number, since it uses as much as digits as its factorization.

2161453603123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 2161453603123 in words is "two trillion, one hundred sixty-one billion, four hundred fifty-three million, six hundred three thousand, one hundred twenty-three".