99644505 has 16 divisors (see below), whose sum is σ = 162440640. Its totient is φ = 52140608.

The previous prime is 99644449. The next prime is 99644507. The reversal of 99644505 is 50544699.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99644505 - 2⁹ = 99643993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99644507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61875 + ... + 63464.

It is an arithmetic number, because the mean of its divisors is an integer number (10152540).

Almost surely, 2^99644505 is an apocalyptic number.

It is an amenable number.

99644505 is a deficient number, since it is larger than the sum of its proper divisors (62796135).

99644505 is a wasteful number, since it uses less digits than its factorization.

99644505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125400.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 99644505 is about 9982.2094247717. The cubic root of 99644505 is about 463.6082097650.

The spelling of 99644505 in words is "ninety-nine million, six hundred forty-four thousand, five hundred five".