4481892661 has 2 divisors, whose sum is σ = 4481892662. Its totient is φ = 4481892660.

The previous prime is 4481892643. The next prime is 4481892719. The reversal of 4481892661 is 1662981844.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3821094225 + 660798436 = 61815^2 + 25706^2 .

It is a cyclic number.

It is not a de Polignac number, because 4481892661 - 2⁷ = 4481892533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4481892361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2240946330 + 2240946331.

It is an arithmetic number, because the mean of its divisors is an integer number (2240946331).

Almost surely, 2^4481892661 is an apocalyptic number.

It is an amenable number.

4481892661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4481892661 is an equidigital number, since it uses as much as digits as its factorization.

4481892661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 4481892661 is about 66946.9391458639. The cubic root of 4481892661 is about 1648.7462359284.

The spelling of 4481892661 in words is "four billion, four hundred eighty-one million, eight hundred ninety-two thousand, six hundred sixty-one".