99180145 has 16 divisors (see below), whose sum is σ = 125991360. Its totient is φ = 74821824.

The previous prime is 99180143. The next prime is 99180149. The reversal of 99180145 is 54108199.

99180145 = T₄₄₆ + T₄₄₇ + ... + T₈₈₀.

It is a cyclic number.

It is not a de Polignac number, because 99180145 - 2¹ = 99180143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99180143) 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, 1719 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (7874460).

Almost surely, 2^99180145 is an apocalyptic number.

It is an amenable number.

99180145 is a deficient number, since it is larger than the sum of its proper divisors (26811215).

99180145 is a wasteful number, since it uses less digits than its factorization.

99180145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 99180145 is about 9958.9228835251. The cubic root of 99180145 is about 462.8869243245.

The spelling of 99180145 in words is "ninety-nine million, one hundred eighty thousand, one hundred forty-five".