53243634491 has 2 divisors, whose sum is σ = 53243634492. Its totient is φ = 53243634490.

The previous prime is 53243634349. The next prime is 53243634523. The reversal of 53243634491 is 19443634235.

53243634491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53243634491 - 2¹⁰ = 53243633467 is a prime.

It is a super-2 number, since 2×53243634491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53243634991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26621817245 + 26621817246.

It is an arithmetic number, because the mean of its divisors is an integer number (26621817246).

Almost surely, 2^53243634491 is an apocalyptic number.

53243634491 is a deficient number, since it is larger than the sum of its proper divisors (1).

53243634491 is an equidigital number, since it uses as much as digits as its factorization.

53243634491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 44.

The spelling of 53243634491 in words is "fifty-three billion, two hundred forty-three million, six hundred thirty-four thousand, four hundred ninety-one".