4450515661 has 4 divisors (see below), whose sum is σ = 4451005692. Its totient is φ = 4450025632.

The previous prime is 4450515637. The next prime is 4450515679. The reversal of 4450515661 is 1665150544.

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

It can be written as a sum of positive squares in 2 ways, for example, as 455011561 + 3995504100 = 21331^2 + 63210^2 .

It is a cyclic number.

It is not a de Polignac number, because 4450515661 - 2⁷ = 4450515533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4450515661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4450515691) 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, 231130 + ... + 249643.

It is an arithmetic number, because the mean of its divisors is an integer number (1112751423).

Almost surely, 2^4450515661 is an apocalyptic number.

It is an amenable number.

4450515661 is a deficient number, since it is larger than the sum of its proper divisors (490031).

4450515661 is an equidigital number, since it uses as much as digits as its factorization.

4450515661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490030.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 4450515661 is about 66712.1852512717. The cubic root of 4450515661 is about 1644.8896876351.

The spelling of 4450515661 in words is "four billion, four hundred fifty million, five hundred fifteen thousand, six hundred sixty-one".