581151980231989 has 2 divisors, whose sum is σ = 581151980231990. Its totient is φ = 581151980231988.

The previous prime is 581151980231959. The next prime is 581151980232001. The reversal of 581151980231989 is 989132089151185.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366343619411025 + 214808360820964 = 19140105^2 + 14656342^2 .

It is a cyclic number.

It is not a de Polignac number, because 581151980231989 - 2⁵ = 581151980231957 is a prime.

It is a super-2 number, since 2×581151980231989² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581151980231959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290575990115994 + 290575990115995.

It is an arithmetic number, because the mean of its divisors is an integer number (290575990115995).

Almost surely, 2^{581151980231989} is an apocalyptic number.

It is an amenable number.

581151980231989 is a deficient number, since it is larger than the sum of its proper divisors (1).

581151980231989 is an equidigital number, since it uses as much as digits as its factorization.

581151980231989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55987200, while the sum is 70.

The spelling of 581151980231989 in words is "five hundred eighty-one trillion, one hundred fifty-one billion, nine hundred eighty million, two hundred thirty-one thousand, nine hundred eighty-nine".