4439690161 has 9 divisors (see below), whose sum is σ = 4642715371. Its totient is φ = 4245194272.

The previous prime is 4439690159. The next prime is 4439690173. The reversal of 4439690161 is 1610969344.

The square root of 4439690161 is 66631.

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., 502880625 + 3936809536 = 22425^2 + 62744^2 .

It is not a de Polignac number, because 4439690161 - 2¹ = 4439690159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4439690261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1531065 + ... + 1533961.

Almost surely, 2^4439690161 is an apocalyptic number.

4439690161 is the 66631-st square number.

4439690161 is the 33316-th centered octagonal number.

It is an amenable number.

4439690161 is a deficient number, since it is larger than the sum of its proper divisors (203025210).

4439690161 is an frugal number, since it uses more digits than its factorization.

4439690161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5840 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The cubic root of 4439690161 is about 1643.5549201597.

The spelling of 4439690161 in words is "four billion, four hundred thirty-nine million, six hundred ninety thousand, one hundred sixty-one".