4191008644 has 9 divisors (see below), whose sum is σ = 7334491717. Its totient is φ = 2095439584.

The previous prime is 4191008629. The next prime is 4191008651. The reversal of 4191008644 is 4468001914.

The square root of 4191008644 is 64738.

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

It can be written as a sum of positive squares in only one way, i.e., 186650244 + 4004358400 = 13662^2 + 63280^2 .

It is a Duffinian number.

It is an unprimeable number.

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 in 2 ways as a sum of consecutive naturals, for example, 113292 + ... + 145660.

Almost surely, 2^4191008644 is an apocalyptic number.

4191008644 is the 64738-th square number.

It is an amenable number.

4191008644 is a deficient number, since it is larger than the sum of its proper divisors (3143483073).

4191008644 is an frugal number, since it uses more digits than its factorization.

4191008644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64742 (or 32371 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The cubic root of 4191008644 is about 1612.2764812790.

The spelling of 4191008644 in words is "four billion, one hundred ninety-one million, eight thousand, six hundred forty-four".