481267781669 has 2 divisors, whose sum is σ = 481267781670. Its totient is φ = 481267781668.

The previous prime is 481267781651. The next prime is 481267781677. The reversal of 481267781669 is 966187762184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366190788769 + 115076992900 = 605137^2 + 339230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-481267781669 is a prime.

It is a super-2 number, since 2×481267781669² (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 (481267781609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240633890834 + 240633890835.

It is an arithmetic number, because the mean of its divisors is an integer number (240633890835).

Almost surely, 2^481267781669 is an apocalyptic number.

It is an amenable number.

481267781669 is a deficient number, since it is larger than the sum of its proper divisors (1).

481267781669 is an equidigital number, since it uses as much as digits as its factorization.

481267781669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 65.

The spelling of 481267781669 in words is "four hundred eighty-one billion, two hundred sixty-seven million, seven hundred eighty-one thousand, six hundred sixty-nine".