581720439049 has 2 divisors, whose sum is σ = 581720439050. Its totient is φ = 581720439048.

The previous prime is 581720439017. The next prime is 581720439067. The reversal of 581720439049 is 940934027185.

581720439049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310284649024 + 271435790025 = 557032^2 + 520995^2 .

It is a cyclic number.

It is not a de Polignac number, because 581720439049 - 2⁵ = 581720439017 is a prime.

It is a super-2 number, since 2×581720439049² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 581720438987 and 581720439005.

It is not a weakly prime, because it can be changed into another prime (581720439149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290860219524 + 290860219525.

It is an arithmetic number, because the mean of its divisors is an integer number (290860219525).

Almost surely, 2^581720439049 is an apocalyptic number.

It is an amenable number.

581720439049 is a deficient number, since it is larger than the sum of its proper divisors (1).

581720439049 is an equidigital number, since it uses as much as digits as its factorization.

581720439049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 581720439049 in words is "five hundred eighty-one billion, seven hundred twenty million, four hundred thirty-nine thousand, forty-nine".