461361131521 has 2 divisors, whose sum is σ = 461361131522. Its totient is φ = 461361131520.

The previous prime is 461361131519. The next prime is 461361131533. The reversal of 461361131521 is 125131163164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275587201296 + 185773930225 = 524964^2 + 431015^2 .

It is a cyclic number.

It is not a de Polignac number, because 461361131521 - 2¹ = 461361131519 is a prime.

Together with 461361131519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (461361131321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230680565760 + 230680565761.

It is an arithmetic number, because the mean of its divisors is an integer number (230680565761).

Almost surely, 2^461361131521 is an apocalyptic number.

It is an amenable number.

461361131521 is a deficient number, since it is larger than the sum of its proper divisors (1).

461361131521 is an equidigital number, since it uses as much as digits as its factorization.

461361131521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

Adding to 461361131521 its reverse (125131163164), we get a palindrome (586492294685).

The spelling of 461361131521 in words is "four hundred sixty-one billion, three hundred sixty-one million, one hundred thirty-one thousand, five hundred twenty-one".