99640949906 has 16 divisors (see below), whose sum is σ = 150277828608. Its totient is φ = 49548458400.

The previous prime is 99640949879. The next prime is 99640949957. The reversal of 99640949906 is 60994904699.

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, 1818446 + ... + 1872438.

It is an arithmetic number, because the mean of its divisors is an integer number (9392364288).

Almost surely, 2^99640949906 is an apocalyptic number.

99640949906 is a deficient number, since it is larger than the sum of its proper divisors (50636878702).

99640949906 is a wasteful number, since it uses less digits than its factorization.

99640949906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59017.

The product of its (nonzero) digits is 34012224, while the sum is 65.

The spelling of 99640949906 in words is "ninety-nine billion, six hundred forty million, nine hundred forty-nine thousand, nine hundred six".