1673412635821 has 2 divisors, whose sum is σ = 1673412635822. Its totient is φ = 1673412635820.

The previous prime is 1673412635809. The next prime is 1673412635833. The reversal of 1673412635821 is 1285362143761.

It is a balanced prime because it is at equal distance from previous prime (1673412635809) and next prime (1673412635833).

It can be written as a sum of positive squares in only one way, i.e., 1261441213321 + 411971422500 = 1123139^2 + 641850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673412635821 - 2⁵ = 1673412635789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673412630821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836706317910 + 836706317911.

It is an arithmetic number, because the mean of its divisors is an integer number (836706317911).

Almost surely, 2^{1673412635821} is an apocalyptic number.

It is an amenable number.

1673412635821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673412635821 is an equidigital number, since it uses as much as digits as its factorization.

1673412635821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The spelling of 1673412635821 in words is "one trillion, six hundred seventy-three billion, four hundred twelve million, six hundred thirty-five thousand, eight hundred twenty-one".