4325181661 has 2 divisors, whose sum is σ = 4325181662. Its totient is φ = 4325181660.

The previous prime is 4325181649. The next prime is 4325181673. The reversal of 4325181661 is 1661815234.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (4325181649) and next prime (4325181673).

It can be written as a sum of positive squares in only one way, i.e., 4251822436 + 73359225 = 65206^2 + 8565^2 .

It is a cyclic number.

It is not a de Polignac number, because 4325181661 - 2¹⁹ = 4324657373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4325181661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4325181631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2162590830 + 2162590831.

It is an arithmetic number, because the mean of its divisors is an integer number (2162590831).

Almost surely, 2^4325181661 is an apocalyptic number.

4325181661 is the 29412-nd centered decagonal number.

It is an amenable number.

4325181661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4325181661 is an equidigital number, since it uses as much as digits as its factorization.

4325181661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 4325181661 is about 65766.1133183344. The cubic root of 4325181661 is about 1629.3014760730.

Adding to 4325181661 its reverse (1661815234), we get a palindrome (5986996895).

The spelling of 4325181661 in words is "four billion, three hundred twenty-five million, one hundred eighty-one thousand, six hundred sixty-one".