485516775781 has 2 divisors, whose sum is σ = 485516775782. Its totient is φ = 485516775780.

The previous prime is 485516775677. The next prime is 485516775803. The reversal of 485516775781 is 187577615584.

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., 427508053281 + 58008722500 = 653841^2 + 240850^2 .

It is a cyclic number.

It is not a de Polignac number, because 485516775781 - 2¹⁷ = 485516644709 is a prime.

It is a super-2 number, since 2×485516775781² (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 (485516772781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242758387890 + 242758387891.

It is an arithmetic number, because the mean of its divisors is an integer number (242758387891).

Almost surely, 2^485516775781 is an apocalyptic number.

It is an amenable number.

485516775781 is a deficient number, since it is larger than the sum of its proper divisors (1).

485516775781 is an equidigital number, since it uses as much as digits as its factorization.

485516775781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856000, while the sum is 64.

The spelling of 485516775781 in words is "four hundred eighty-five billion, five hundred sixteen million, seven hundred seventy-five thousand, seven hundred eighty-one".