505404450461 has 2 divisors, whose sum is σ = 505404450462. Its totient is φ = 505404450460.

The previous prime is 505404450457. The next prime is 505404450487. The reversal of 505404450461 is 164054404505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367637281561 + 137767168900 = 606331^2 + 371170^2 .

It is a cyclic number.

It is not a de Polignac number, because 505404450461 - 2² = 505404450457 is a prime.

It is a super-2 number, since 2×505404450461² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505404450451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252702225230 + 252702225231.

It is an arithmetic number, because the mean of its divisors is an integer number (252702225231).

Almost surely, 2^505404450461 is an apocalyptic number.

It is an amenable number.

505404450461 is a deficient number, since it is larger than the sum of its proper divisors (1).

505404450461 is an equidigital number, since it uses as much as digits as its factorization.

505404450461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 505404450461 its reverse (164054404505), we get a palindrome (669458854966).

The spelling of 505404450461 in words is "five hundred five billion, four hundred four million, four hundred fifty thousand, four hundred sixty-one".