4494081637 has 2 divisors, whose sum is σ = 4494081638. Its totient is φ = 4494081636.

The previous prime is 4494081589. The next prime is 4494081649. The reversal of 4494081637 is 7361804944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4282262721 + 211818916 = 65439^2 + 14554^2 .

It is a cyclic number.

It is not a de Polignac number, because 4494081637 - 2¹⁹ = 4493557349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4494081667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2247040818 + 2247040819.

It is an arithmetic number, because the mean of its divisors is an integer number (2247040819).

Almost surely, 2^4494081637 is an apocalyptic number.

It is an amenable number.

4494081637 is a deficient number, since it is larger than the sum of its proper divisors (1).

4494081637 is an equidigital number, since it uses as much as digits as its factorization.

4494081637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 4494081637 is about 67037.9119379475. The cubic root of 4494081637 is about 1650.2395289849.

The spelling of 4494081637 in words is "four billion, four hundred ninety-four million, eighty-one thousand, six hundred thirty-seven".