99878999987896 has 64 divisors (see below), whose sum is σ = 193570959329280. Its totient is φ = 48264394631040.

The previous prime is 99878999987887. The next prime is 99878999987903. The reversal of 99878999987896 is 69878999987899.

It is a self number, because there is not a number n which added to its sum of digits gives 99878999987896.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650079741 + ... + 650233363.

It is an arithmetic number, because the mean of its divisors is an integer number (3024546239520).

Almost surely, 2^{99878999987896} is an apocalyptic number.

It is an amenable number.

99878999987896 is a deficient number, since it is larger than the sum of its proper divisors (93691959341384).

99878999987896 is a wasteful number, since it uses less digits than its factorization.

99878999987896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157124 (or 157120 counting only the distinct ones).

The product of its digits is 5759766061056, while the sum is 115.

The spelling of 99878999987896 in words is "ninety-nine trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred ninety-six".