461533661 has 2 divisors, whose sum is σ = 461533662. Its totient is φ = 461533660.

The previous prime is 461533651. The next prime is 461533727. The reversal of 461533661 is 166335164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349914436 + 111619225 = 18706^2 + 10565^2 .

It is a cyclic number.

It is not a de Polignac number, because 461533661 - 2¹⁰ = 461532637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461533601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230766830 + 230766831.

It is an arithmetic number, because the mean of its divisors is an integer number (230766831).

Almost surely, 2^461533661 is an apocalyptic number.

It is an amenable number.

461533661 is a deficient number, since it is larger than the sum of its proper divisors (1).

461533661 is an equidigital number, since it uses as much as digits as its factorization.

461533661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 461533661 is about 21483.3344944401. The cubic root of 461533661 is about 772.8012104111.

The spelling of 461533661 in words is "four hundred sixty-one million, five hundred thirty-three thousand, six hundred sixty-one".