53243016643 has 2 divisors, whose sum is σ = 53243016644. Its totient is φ = 53243016642.

The previous prime is 53243016599. The next prime is 53243016691. The reversal of 53243016643 is 34661034235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53243016643 - 2⁹ = 53243016131 is a prime.

It is not a weakly prime, because it can be changed into another prime (53243016143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26621508321 + 26621508322.

It is an arithmetic number, because the mean of its divisors is an integer number (26621508322).

Almost surely, 2^53243016643 is an apocalyptic number.

53243016643 is a deficient number, since it is larger than the sum of its proper divisors (1).

53243016643 is an equidigital number, since it uses as much as digits as its factorization.

53243016643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 53243016643 in words is "fifty-three billion, two hundred forty-three million, sixteen thousand, six hundred forty-three".