99640949908 has 6 divisors (see below), whose sum is σ = 174371662346. Its totient is φ = 49820474952.

The previous prime is 99640949879. The next prime is 99640949957. The reversal of 99640949908 is 80994904699.

It can be written as a sum of positive squares in only one way, i.e., 92020009104 + 7620940804 = 303348^2 + 87298^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12455118735 + ... + 12455118742.

Almost surely, 2^99640949908 is an apocalyptic number.

It is an amenable number.

99640949908 is a deficient number, since it is larger than the sum of its proper divisors (74730712438).

99640949908 is a wasteful number, since it uses less digits than its factorization.

99640949908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24910237481 (or 24910237479 counting only the distinct ones).

The product of its (nonzero) digits is 45349632, while the sum is 67.

The spelling of 99640949908 in words is "ninety-nine billion, six hundred forty million, nine hundred forty-nine thousand, nine hundred eight".