231601716449 has 2 divisors, whose sum is σ = 231601716450. Its totient is φ = 231601716448.

The previous prime is 231601716433. The next prime is 231601716499. The reversal of 231601716449 is 944617106132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192595466449 + 39006250000 = 438857^2 + 197500^2 .

It is a cyclic number.

It is not a de Polignac number, because 231601716449 - 2⁴ = 231601716433 is a prime.

It is not a weakly prime, because it can be changed into another prime (231601716499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115800858224 + 115800858225.

It is an arithmetic number, because the mean of its divisors is an integer number (115800858225).

Almost surely, 2^231601716449 is an apocalyptic number.

It is an amenable number.

231601716449 is a deficient number, since it is larger than the sum of its proper divisors (1).

231601716449 is an equidigital number, since it uses as much as digits as its factorization.

231601716449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 231601716449 in words is "two hundred thirty-one billion, six hundred one million, seven hundred sixteen thousand, four hundred forty-nine".