99999936863 has 4 divisors (see below), whose sum is σ = 100436618040. Its totient is φ = 99563255688.

The previous prime is 99999936853. The next prime is 99999936899. The reversal of 99999936863 is 36863999999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999936863 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 (99999936853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218340245 + ... + 218340702.

It is an arithmetic number, because the mean of its divisors is an integer number (25109154510).

Almost surely, 2^99999936863 is an apocalyptic number.

99999936863 is a deficient number, since it is larger than the sum of its proper divisors (436681177).

99999936863 is a wasteful number, since it uses less digits than its factorization.

99999936863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436681176.

The product of its digits is 1377495072, while the sum is 80.

The spelling of 99999936863 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred thirty-six thousand, eight hundred sixty-three".