1683962273681 has 2 divisors, whose sum is σ = 1683962273682. Its totient is φ = 1683962273680.

The previous prime is 1683962273629. The next prime is 1683962273753. The reversal of 1683962273681 is 1863722693861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1639014457600 + 44947816081 = 1280240^2 + 212009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1683962273681 is a prime.

It is a super-2 number, since 2×1683962273681² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1683962273381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841981136840 + 841981136841.

It is an arithmetic number, because the mean of its divisors is an integer number (841981136841).

Almost surely, 2^{1683962273681} is an apocalyptic number.

It is an amenable number.

1683962273681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683962273681 is an equidigital number, since it uses as much as digits as its factorization.

1683962273681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 62.

The spelling of 1683962273681 in words is "one trillion, six hundred eighty-three billion, nine hundred sixty-two million, two hundred seventy-three thousand, six hundred eighty-one".