1684016781053 has 2 divisors, whose sum is σ = 1684016781054. Its totient is φ = 1684016781052.

The previous prime is 1684016781049. The next prime is 1684016781157. The reversal of 1684016781053 is 3501876104861.

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., 968466587449 + 715550193604 = 984107^2 + 845902^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684016781053 - 2² = 1684016781049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1684016780992 and 1684016781010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684016781253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842008390526 + 842008390527.

It is an arithmetic number, because the mean of its divisors is an integer number (842008390527).

Almost surely, 2^{1684016781053} is an apocalyptic number.

It is an amenable number.

1684016781053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684016781053 is an equidigital number, since it uses as much as digits as its factorization.

1684016781053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 1684016781053 in words is "one trillion, six hundred eighty-four billion, sixteen million, seven hundred eighty-one thousand, fifty-three".