231632709661 has 2 divisors, whose sum is σ = 231632709662. Its totient is φ = 231632709660.

The previous prime is 231632709631. The next prime is 231632709673. The reversal of 231632709661 is 166907236132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122154444036 + 109478265625 = 349506^2 + 330875^2 .

It is a cyclic number.

It is not a de Polignac number, because 231632709661 - 2⁵ = 231632709629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231632709601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115816354830 + 115816354831.

It is an arithmetic number, because the mean of its divisors is an integer number (115816354831).

Almost surely, 2^231632709661 is an apocalyptic number.

It is an amenable number.

231632709661 is a deficient number, since it is larger than the sum of its proper divisors (1).

231632709661 is an equidigital number, since it uses as much as digits as its factorization.

231632709661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 231632709661 in words is "two hundred thirty-one billion, six hundred thirty-two million, seven hundred nine thousand, six hundred sixty-one".