99643948786 has 16 divisors (see below), whose sum is σ = 154642011840. Its totient is φ = 48097102480.

The previous prime is 99643948759. The next prime is 99643948793. The reversal of 99643948786 is 68784934699.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299115 + ... + 537361.

It is an arithmetic number, because the mean of its divisors is an integer number (9665125740).

Almost surely, 2^99643948786 is an apocalyptic number.

99643948786 is a deficient number, since it is larger than the sum of its proper divisors (54998063054).

99643948786 is a wasteful number, since it uses less digits than its factorization.

99643948786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245489.

The product of its digits is 564350976, while the sum is 73.

The spelling of 99643948786 in words is "ninety-nine billion, six hundred forty-three million, nine hundred forty-eight thousand, seven hundred eighty-six".