4494890661 has 16 divisors (see below), whose sum is σ = 6403953600. Its totient is φ = 2794445568.

The previous prime is 4494890651. The next prime is 4494890683. The reversal of 4494890661 is 1660984944.

It is not a de Polignac number, because 4494890661 - 2¹⁵ = 4494857893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4494890651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398731 + ... + 409848.

It is an arithmetic number, because the mean of its divisors is an integer number (400247100).

Almost surely, 2^4494890661 is an apocalyptic number.

It is an amenable number.

4494890661 is a deficient number, since it is larger than the sum of its proper divisors (1909062939).

4494890661 is a wasteful number, since it uses less digits than its factorization.

4494890661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808708.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 4494890661 is about 67043.9457445637. The cubic root of 4494890661 is about 1650.3385483461.

The spelling of 4494890661 in words is "four billion, four hundred ninety-four million, eight hundred ninety thousand, six hundred sixty-one".