4581216187 has 6 divisors (see below), whose sum is σ = 4650154908. Its totient is φ = 4512294072.

The previous prime is 4581216149. The next prime is 4581216191. The reversal of 4581216187 is 7816121854.

It is a de Polignac number, because none of the positive numbers 2^k-4581216187 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4581216127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549889 + ... + 558157.

It is an arithmetic number, because the mean of its divisors is an integer number (775025818).

Almost surely, 2^4581216187 is an apocalyptic number.

4581216187 is a deficient number, since it is larger than the sum of its proper divisors (68938721).

4581216187 is an frugal number, since it uses more digits than its factorization.

4581216187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16605 (or 8336 counting only the distinct ones).

The product of its digits is 107520, while the sum is 43.

The square root of 4581216187 is about 67684.6820706133. The cubic root of 4581216187 is about 1660.8366841116.

The spelling of 4581216187 in words is "four billion, five hundred eighty-one million, two hundred sixteen thousand, one hundred eighty-seven".