99640949907 has 8 divisors (see below), whose sum is σ = 132857823184. Its totient is φ = 66425688288.

The previous prime is 99640949879. The next prime is 99640949957. The reversal of 99640949907 is 70994904699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99640949907 - 2²⁶ = 99573841043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99640949957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250408 + ... + 511845.

It is an arithmetic number, because the mean of its divisors is an integer number (16607227898).

Almost surely, 2^99640949907 is an apocalyptic number.

99640949907 is a deficient number, since it is larger than the sum of its proper divisors (33216873277).

99640949907 is a wasteful number, since it uses less digits than its factorization.

99640949907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805829.

The product of its (nonzero) digits is 39680928, while the sum is 66.

The spelling of 99640949907 in words is "ninety-nine billion, six hundred forty million, nine hundred forty-nine thousand, nine hundred seven".