4451691841 has 3 divisors (see below), whose sum is σ = 4451758563. Its totient is φ = 4451625120.

The previous prime is 4451691833. The next prime is 4451691847. The reversal of 4451691841 is 1481961544.

The square root of 4451691841 is 66721.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1995498241 + 2456193600 = 44671^2 + 49560^2 .

It is not a de Polignac number, because 4451691841 - 2³ = 4451691833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4451691847) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 33361 + ... + 100081.

It is an arithmetic number, because the mean of its divisors is an integer number (1483919521).

Almost surely, 2^4451691841 is an apocalyptic number.

4451691841 is the 66721-st square number.

4451691841 is the 33361-st centered octagonal number.

It is an amenable number.

4451691841 is a deficient number, since it is larger than the sum of its proper divisors (66722).

4451691841 is an frugal number, since it uses more digits than its factorization.

4451691841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133442 (or 66721 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The cubic root of 4451691841 is about 1645.0345784067.

The spelling of 4451691841 in words is "four billion, four hundred fifty-one million, six hundred ninety-one thousand, eight hundred forty-one".