99649743665 has 8 divisors (see below), whose sum is σ = 120812473320. Its totient is φ = 78897940992.

The previous prime is 99649743637. The next prime is 99649743701. The reversal of 99649743665 is 56634794699.

It can be written as a sum of positive squares in 4 ways, for example, as 20502784 + 99629240881 = 4528^2 + 315641^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99649743665 - 2³⁶ = 30930266929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99649743595 and 99649743604.

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, 102731210 + ... + 102732179.

It is an arithmetic number, because the mean of its divisors is an integer number (15101559165).

Almost surely, 2^99649743665 is an apocalyptic number.

It is an amenable number.

99649743665 is a deficient number, since it is larger than the sum of its proper divisors (21162729655).

99649743665 is a wasteful number, since it uses less digits than its factorization.

99649743665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205463491.

The product of its digits is 264539520, while the sum is 68.

The spelling of 99649743665 in words is "ninety-nine billion, six hundred forty-nine million, seven hundred forty-three thousand, six hundred sixty-five".