846520525481 has 2 divisors, whose sum is σ = 846520525482. Its totient is φ = 846520525480.

The previous prime is 846520525457. The next prime is 846520525483. The reversal of 846520525481 is 184525025648.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792650115481 + 53870410000 = 890309^2 + 232100^2 .

It is a cyclic number.

It is not a de Polignac number, because 846520525481 - 2¹⁰ = 846520524457 is a prime.

It is a super-2 number, since 2×846520525481² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 846520525483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (846520525483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423260262740 + 423260262741.

It is an arithmetic number, because the mean of its divisors is an integer number (423260262741).

Almost surely, 2^846520525481 is an apocalyptic number.

It is an amenable number.

846520525481 is a deficient number, since it is larger than the sum of its proper divisors (1).

846520525481 is an equidigital number, since it uses as much as digits as its factorization.

846520525481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072000, while the sum is 50.

The spelling of 846520525481 in words is "eight hundred forty-six billion, five hundred twenty million, five hundred twenty-five thousand, four hundred eighty-one".