99749756138 has 8 divisors (see below), whose sum is σ = 158426083332. Its totient is φ = 46941061696.

The previous prime is 99749756129. The next prime is 99749756167. The reversal of 99749756138 is 83165794799.

It can be written as a sum of positive squares in 2 ways, for example, as 78138698089 + 21611058049 = 279533^2 + 147007^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466908145 + ... + 1466908212.

Almost surely, 2^99749756138 is an apocalyptic number.

99749756138 is a deficient number, since it is larger than the sum of its proper divisors (58676327194).

99749756138 is a wasteful number, since it uses less digits than its factorization.

99749756138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933816376.

The product of its digits is 102876480, while the sum is 68.

The spelling of 99749756138 in words is "ninety-nine billion, seven hundred forty-nine million, seven hundred fifty-six thousand, one hundred thirty-eight".