99605545109 has 32 divisors (see below), whose sum is σ = 121735710720. Its totient is φ = 79596209088.

The previous prime is 99605545049. The next prime is 99605545183. The reversal of 99605545109 is 90154550699.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99605545109 is a prime.

It is a super-2 number, since 2×99605545109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99605545199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9948584 + ... + 9958590.

It is an arithmetic number, because the mean of its divisors is an integer number (3804240960).

Almost surely, 2^99605545109 is an apocalyptic number.

It is an amenable number.

99605545109 is a deficient number, since it is larger than the sum of its proper divisors (22130165611).

99605545109 is a wasteful number, since it uses less digits than its factorization.

99605545109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11217.

The product of its (nonzero) digits is 2187000, while the sum is 53.

The spelling of 99605545109 in words is "ninety-nine billion, six hundred five million, five hundred forty-five thousand, one hundred nine".