4570731661 has 2 divisors, whose sum is σ = 4570731662. Its totient is φ = 4570731660.

The previous prime is 4570731643. The next prime is 4570731679. The reversal of 4570731661 is 1661370754.

4570731661 = 47805² + 47806².

It is a balanced prime because it is at equal distance from previous prime (4570731643) and next prime (4570731679).

It can be written as a sum of positive squares in only one way, i.e., 2285413636 + 2285318025 = 47806^2 + 47805^2 .

It is a cyclic number.

It is not a de Polignac number, because 4570731661 - 2⁹ = 4570731149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4570731601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2285365830 + 2285365831.

It is an arithmetic number, because the mean of its divisors is an integer number (2285365831).

Almost surely, 2^4570731661 is an apocalyptic number.

4570731661 is the 47806-th centered square number.

It is an amenable number.

4570731661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4570731661 is an equidigital number, since it uses as much as digits as its factorization.

4570731661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 4570731661 is about 67607.1864597248. The cubic root of 4570731661 is about 1659.5687248765.

The spelling of 4570731661 in words is "four billion, five hundred seventy million, seven hundred thirty-one thousand, six hundred sixty-one".