4168639225 has 27 divisors (see below), whose sum is σ = 5327860167. Its totient is φ = 3235481280.

The previous prime is 4168639219. The next prime is 4168639229. The reversal of 4168639225 is 5229368614.

The square root of 4168639225 is 64565.

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

4168639225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 214241769 + 3954397456 = 14637^2 + 62884^2 .

It is not a de Polignac number, because 4168639225 - 2³ = 4168639217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4168639229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11944351 + ... + 11944699.

Almost surely, 2^4168639225 is an apocalyptic number.

4168639225 is the 64565-th square number.

4168639225 is the 32283-rd centered octagonal number.

It is an amenable number.

4168639225 is a deficient number, since it is larger than the sum of its proper divisors (1159220942).

4168639225 is an frugal number, since it uses more digits than its factorization.

4168639225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 391 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The cubic root of 4168639225 is about 1609.4028654992.

The spelling of 4168639225 in words is "four billion, one hundred sixty-eight million, six hundred thirty-nine thousand, two hundred twenty-five".