99168440943645 has 48 divisors (see below), whose sum is σ = 178640043865920. Its totient is φ = 52776580402944.

The previous prime is 99168440943641. The next prime is 99168440943653. The reversal of 99168440943645 is 54634904486199.

It is a happy number.

99168440943645 is a `hidden beast` number, since 9 + 9 + 1 + 68 + 440 + 94 + 36 + 4 + 5 = 666.

It is not a de Polignac number, because 99168440943645 - 2² = 99168440943641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99168440943641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86820300 + ... + 87955109.

It is an arithmetic number, because the mean of its divisors is an integer number (3721667580540).

Almost surely, 2^{99168440943645} is an apocalyptic number.

It is an amenable number.

99168440943645 is a deficient number, since it is larger than the sum of its proper divisors (79471602922275).

99168440943645 is a wasteful number, since it uses less digits than its factorization.

99168440943645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174775896 (or 174775884 counting only the distinct ones).

The product of its (nonzero) digits is 806215680, while the sum is 72.

The spelling of 99168440943645 in words is "ninety-nine trillion, one hundred sixty-eight billion, four hundred forty million, nine hundred forty-three thousand, six hundred forty-five".