99999963533 has 4 divisors (see below), whose sum is σ = 100000622208. Its totient is φ = 99999304860.

The previous prime is 99999963499. The next prime is 99999963643. The reversal of 99999963533 is 33536999999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33536999999 = 20341 ⋅1648739.

It is a cyclic number.

It is not a de Polignac number, because 99999963533 - 2²⁰ = 99998914957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999963433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26678 + ... + 448008.

It is an arithmetic number, because the mean of its divisors is an integer number (25000155552).

Almost surely, 2^99999963533 is an apocalyptic number.

It is an amenable number.

99999963533 is a deficient number, since it is larger than the sum of its proper divisors (658675).

99999963533 is a wasteful number, since it uses less digits than its factorization.

99999963533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658674.

The product of its digits is 430467210, while the sum is 74.

The spelling of 99999963533 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred sixty-three thousand, five hundred thirty-three".