1683038945281 has 2 divisors, whose sum is σ = 1683038945282. Its totient is φ = 1683038945280.

The previous prime is 1683038945279. The next prime is 1683038945333. The reversal of 1683038945281 is 1825498303861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322097530625 + 360941414656 = 1149825^2 + 600784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683038945281 - 2¹ = 1683038945279 is a prime.

It is a super-2 number, since 2×1683038945281² (a number of 25 digits) contains 22 as substring.

Together with 1683038945279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1683038945381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841519472640 + 841519472641.

It is an arithmetic number, because the mean of its divisors is an integer number (841519472641).

Almost surely, 2^{1683038945281} is an apocalyptic number.

It is an amenable number.

1683038945281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683038945281 is an equidigital number, since it uses as much as digits as its factorization.

1683038945281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 1683038945281 in words is "one trillion, six hundred eighty-three billion, thirty-eight million, nine hundred forty-five thousand, two hundred eighty-one".