99645320160 has 144 divisors (see below), whose sum is σ = 340131551760. Its totient is φ = 26564904960.

The previous prime is 99645320149. The next prime is 99645320197. The reversal of 99645320160 is 6102354699.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7309831 + ... + 7323449.

It is an arithmetic number, because the mean of its divisors is an integer number (2362024665).

Almost surely, 2^99645320160 is an apocalyptic number.

99645320160 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99645320160 is an abundant number, since it is smaller than the sum of its proper divisors (240486231600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99645320160 is a wasteful number, since it uses less digits than its factorization.

99645320160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721 (or 18710 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 99645320160 in words is "ninety-nine billion, six hundred forty-five million, three hundred twenty thousand, one hundred sixty".