1645043324753 has 2 divisors, whose sum is σ = 1645043324754. Its totient is φ = 1645043324752.

The previous prime is 1645043324633. The next prime is 1645043324759. The reversal of 1645043324753 is 3574233405461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107310034944 + 537733289809 = 1052288^2 + 733303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1645043324753 - 2²⁰ = 1645042276177 is a prime.

It is a super-2 number, since 2×1645043324753² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1645043324698 and 1645043324707.

It is not a weakly prime, because it can be changed into another prime (1645043324759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822521662376 + 822521662377.

It is an arithmetic number, because the mean of its divisors is an integer number (822521662377).

Almost surely, 2^{1645043324753} is an apocalyptic number.

It is an amenable number.

1645043324753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645043324753 is an equidigital number, since it uses as much as digits as its factorization.

1645043324753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 47.

The spelling of 1645043324753 in words is "one trillion, six hundred forty-five billion, forty-three million, three hundred twenty-four thousand, seven hundred fifty-three".