99871353656 has 8 divisors (see below), whose sum is σ = 187258788120. Its totient is φ = 49935676824.

The previous prime is 99871353629. The next prime is 99871353719. The reversal of 99871353656 is 65635317899.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6241959596 + ... + 6241959611.

It is an arithmetic number, because the mean of its divisors is an integer number (23407348515).

Almost surely, 2^99871353656 is an apocalyptic number.

It is an amenable number.

99871353656 is a deficient number, since it is larger than the sum of its proper divisors (87387434464).

99871353656 is a wasteful number, since it uses less digits than its factorization.

99871353656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483919213 (or 12483919209 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 62.

The spelling of 99871353656 in words is "ninety-nine billion, eight hundred seventy-one million, three hundred fifty-three thousand, six hundred fifty-six".