2581122471773 has 2 divisors, whose sum is σ = 2581122471774. Its totient is φ = 2581122471772.

The previous prime is 2581122471769. The next prime is 2581122471779. The reversal of 2581122471773 is 3771742211852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1339729856089 + 1241392615684 = 1157467^2 + 1114178^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581122471773 - 2² = 2581122471769 is a prime.

It is a super-2 number, since 2×2581122471773² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2581122471779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290561235886 + 1290561235887.

It is an arithmetic number, because the mean of its divisors is an integer number (1290561235887).

Almost surely, 2^{2581122471773} is an apocalyptic number.

It is an amenable number.

2581122471773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581122471773 is an equidigital number, since it uses as much as digits as its factorization.

2581122471773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The spelling of 2581122471773 in words is "two trillion, five hundred eighty-one billion, one hundred twenty-two million, four hundred seventy-one thousand, seven hundred seventy-three".