5645753021 has 2 divisors, whose sum is σ = 5645753022. Its totient is φ = 5645753020.

The previous prime is 5645753017. The next prime is 5645753051. The reversal of 5645753021 is 1203575465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4666939225 + 978813796 = 68315^2 + 31286^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645753021 - 2² = 5645753017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5645753051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822876510 + 2822876511.

It is an arithmetic number, because the mean of its divisors is an integer number (2822876511).

Almost surely, 2^5645753021 is an apocalyptic number.

It is an amenable number.

5645753021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645753021 is an equidigital number, since it uses as much as digits as its factorization.

5645753021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 5645753021 is about 75138.2260969741. The cubic root of 5645753021 is about 1780.6311170496.

The spelling of 5645753021 in words is "five billion, six hundred forty-five million, seven hundred fifty-three thousand, twenty-one".