53865485533 has 2 divisors, whose sum is σ = 53865485534. Its totient is φ = 53865485532.

The previous prime is 53865485519. The next prime is 53865485591. The reversal of 53865485533 is 33558456835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39815413444 + 14050072089 = 199538^2 + 118533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53865485533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53865485503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26932742766 + 26932742767.

It is an arithmetic number, because the mean of its divisors is an integer number (26932742767).

Almost surely, 2^53865485533 is an apocalyptic number.

It is an amenable number.

53865485533 is a deficient number, since it is larger than the sum of its proper divisors (1).

53865485533 is an equidigital number, since it uses as much as digits as its factorization.

53865485533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920000, while the sum is 55.

The spelling of 53865485533 in words is "fifty-three billion, eight hundred sixty-five million, four hundred eighty-five thousand, five hundred thirty-three".