1631162666417 has 2 divisors, whose sum is σ = 1631162666418. Its totient is φ = 1631162666416.

The previous prime is 1631162666381. The next prime is 1631162666489. The reversal of 1631162666417 is 7146662611361.

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., 1355806400881 + 275356265536 = 1164391^2 + 524744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631162666417 - 2¹⁰ = 1631162665393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1631162366417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815581333208 + 815581333209.

It is an arithmetic number, because the mean of its divisors is an integer number (815581333209).

Almost surely, 2^{1631162666417} is an apocalyptic number.

It is an amenable number.

1631162666417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631162666417 is an equidigital number, since it uses as much as digits as its factorization.

1631162666417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The spelling of 1631162666417 in words is "one trillion, six hundred thirty-one billion, one hundred sixty-two million, six hundred sixty-six thousand, four hundred seventeen".