4155729661 has 2 divisors, whose sum is σ = 4155729662. Its totient is φ = 4155729660.

The previous prime is 4155729593. The next prime is 4155729671. The reversal of 4155729661 is 1669275514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3325713561 + 830016100 = 57669^2 + 28810^2 .

It is a cyclic number.

It is not a de Polignac number, because 4155729661 - 2¹³ = 4155721469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4155729671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077864830 + 2077864831.

It is an arithmetic number, because the mean of its divisors is an integer number (2077864831).

Almost surely, 2^4155729661 is an apocalyptic number.

It is an amenable number.

4155729661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155729661 is an equidigital number, since it uses as much as digits as its factorization.

4155729661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 4155729661 is about 64464.9490886327. The cubic root of 4155729661 is about 1607.7397989337.

The spelling of 4155729661 in words is "four billion, one hundred fifty-five million, seven hundred twenty-nine thousand, six hundred sixty-one".