1646438346461 has 2 divisors, whose sum is σ = 1646438346462. Its totient is φ = 1646438346460.

The previous prime is 1646438346403. The next prime is 1646438346463.

1646438346461 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194061038361 + 452377308100 = 1092731^2 + 672590^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1646438346461 - 2²⁶ = 1646371237597 is a prime.

Together with 1646438346463, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1646438346397 and 1646438346406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646438346463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823219173230 + 823219173231.

It is an arithmetic number, because the mean of its divisors is an integer number (823219173231).

Almost surely, 2^{1646438346461} is an apocalyptic number.

It is an amenable number.

1646438346461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646438346461 is an equidigital number, since it uses as much as digits as its factorization.

1646438346461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 56.

The spelling of 1646438346461 in words is "one trillion, six hundred forty-six billion, four hundred thirty-eight million, three hundred forty-six thousand, four hundred sixty-one".