1863663146729 has 2 divisors, whose sum is σ = 1863663146730. Its totient is φ = 1863663146728.

The previous prime is 1863663146701. The next prime is 1863663146749. The reversal of 1863663146729 is 9276413663681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1367028640000 + 496634506729 = 1169200^2 + 704723^2 .

It is an emirp because it is prime and its reverse (9276413663681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1863663146729 - 2¹⁶ = 1863663081193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1863663146749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 931831573364 + 931831573365.

It is an arithmetic number, because the mean of its divisors is an integer number (931831573365).

Almost surely, 2^{1863663146729} is an apocalyptic number.

It is an amenable number.

1863663146729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863663146729 is an equidigital number, since it uses as much as digits as its factorization.

1863663146729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 62.

The spelling of 1863663146729 in words is "one trillion, eight hundred sixty-three billion, six hundred sixty-three million, one hundred forty-six thousand, seven hundred twenty-nine".