1645043324701 has 12 divisors (see below), whose sum is σ = 1933349892348. Its totient is φ = 1395500666112.

The previous prime is 1645043324633. The next prime is 1645043324753. The reversal of 1645043324701 is 1074233405461.

It can be written as a sum of positive squares in 2 ways, for example, as 1084493132100 + 560550192601 = 1041390^2 + 748699^2 .

It is not a de Polignac number, because 1645043324701 - 2⁹ = 1645043324189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645043324401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173048406 + ... + 173057911.

It is an arithmetic number, because the mean of its divisors is an integer number (161112491029).

Almost surely, 2^{1645043324701} is an apocalyptic number.

It is an amenable number.

1645043324701 is a deficient number, since it is larger than the sum of its proper divisors (288306567647).

1645043324701 is an equidigital number, since it uses as much as digits as its factorization.

1645043324701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346106428 (or 346106421 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 1645043324701 in words is "one trillion, six hundred forty-five billion, forty-three million, three hundred twenty-four thousand, seven hundred one".