99836566945 has 16 divisors (see below), whose sum is σ = 126185379840. Its totient is φ = 75619989504.

The previous prime is 99836566919. The next prime is 99836566987. The reversal of 99836566945 is 54966563899.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99836566945 - 2⁵ = 99836566913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157984 + ... + 473953.

It is an arithmetic number, because the mean of its divisors is an integer number (7886586240).

Almost surely, 2^99836566945 is an apocalyptic number.

99836566945 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99836566945 is the 157985-th decagonal number.

It is an amenable number.

99836566945 is a deficient number, since it is larger than the sum of its proper divisors (26348812895).

99836566945 is a wasteful number, since it uses less digits than its factorization.

99836566945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633624.

The product of its digits is 377913600, while the sum is 70.

The spelling of 99836566945 in words is "ninety-nine billion, eight hundred thirty-six million, five hundred sixty-six thousand, nine hundred forty-five".