11259585781 has 2 divisors, whose sum is σ = 11259585782. Its totient is φ = 11259585780.

The previous prime is 11259585739. The next prime is 11259585787. The reversal of 11259585781 is 18758595211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9612037681 + 1647548100 = 98041^2 + 40590^2 .

It is a cyclic number.

It is not a de Polignac number, because 11259585781 - 2¹⁷ = 11259454709 is a prime.

It is a super-2 number, since 2×11259585781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11259585787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5629792890 + 5629792891.

It is an arithmetic number, because the mean of its divisors is an integer number (5629792891).

Almost surely, 2^11259585781 is an apocalyptic number.

It is an amenable number.

11259585781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11259585781 is an equidigital number, since it uses as much as digits as its factorization.

11259585781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 52.

The spelling of 11259585781 in words is "eleven billion, two hundred fifty-nine million, five hundred eighty-five thousand, seven hundred eighty-one".