1643252347153 has 2 divisors, whose sum is σ = 1643252347154. Its totient is φ = 1643252347152.

The previous prime is 1643252347111. The next prime is 1643252347169. The reversal of 1643252347153 is 3517432523461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1573589607184 + 69662739969 = 1254428^2 + 263937^2 .

It is an emirp because it is prime and its reverse (3517432523461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1643252347153 - 2³⁷ = 1505813393681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1643252347183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821626173576 + 821626173577.

It is an arithmetic number, because the mean of its divisors is an integer number (821626173577).

Almost surely, 2^{1643252347153} is an apocalyptic number.

It is an amenable number.

1643252347153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643252347153 is an equidigital number, since it uses as much as digits as its factorization.

1643252347153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 46.

The spelling of 1643252347153 in words is "one trillion, six hundred forty-three billion, two hundred fifty-two million, three hundred forty-seven thousand, one hundred fifty-three".