4451216191 has 4 divisors (see below), whose sum is σ = 4455044712. Its totient is φ = 4447387672.

The previous prime is 4451216171. The next prime is 4451216201. The reversal of 4451216191 is 1916121544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4451216191 - 2⁹ = 4451215679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451216111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912516 + ... + 1914841.

It is an arithmetic number, because the mean of its divisors is an integer number (1113761178).

Almost surely, 2^4451216191 is an apocalyptic number.

4451216191 is a deficient number, since it is larger than the sum of its proper divisors (3828521).

4451216191 is a wasteful number, since it uses less digits than its factorization.

4451216191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828520.

The product of its digits is 8640, while the sum is 34.

The square root of 4451216191 is about 66717.4354348247. The cubic root of 4451216191 is about 1644.9759873067.

The spelling of 4451216191 in words is "four billion, four hundred fifty-one million, two hundred sixteen thousand, one hundred ninety-one".