505446253861 has 2 divisors, whose sum is σ = 505446253862. Its totient is φ = 505446253860.

The previous prime is 505446253723. The next prime is 505446253867. The reversal of 505446253861 is 168352644505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287329232961 + 218117020900 = 536031^2 + 467030^2 .

It is a cyclic number.

It is not a de Polignac number, because 505446253861 - 2²¹ = 505444156709 is a prime.

It is a super-3 number, since 3×505446253861³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505446253867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252723126930 + 252723126931.

It is an arithmetic number, because the mean of its divisors is an integer number (252723126931).

Almost surely, 2^505446253861 is an apocalyptic number.

It is an amenable number.

505446253861 is a deficient number, since it is larger than the sum of its proper divisors (1).

505446253861 is an equidigital number, since it uses as much as digits as its factorization.

505446253861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 505446253861 in words is "five hundred five billion, four hundred forty-six million, two hundred fifty-three thousand, eight hundred sixty-one".