1643461021341 has 12 divisors (see below), whose sum is σ = 2395666933660. Its totient is φ = 1085588930880.

The previous prime is 1643461021327. The next prime is 1643461021369. The reversal of 1643461021341 is 1431201643461.

1643461021341 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 4 + 610 + 2 + 1 + 34 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 566060616900 + 1077400404441 = 752370^2 + 1037979^2 .

It is not a de Polignac number, because 1643461021341 - 2⁹ = 1643461020829 is a prime.

It is a super-3 number, since 3×1643461021341³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1643461021296 and 1643461021305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643461021141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 837644800 + ... + 837646761.

Almost surely, 2^{1643461021341} is an apocalyptic number.

It is an amenable number.

1643461021341 is a deficient number, since it is larger than the sum of its proper divisors (752205912319).

1643461021341 is a wasteful number, since it uses less digits than its factorization.

1643461021341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675291676 (or 1675291673 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 1643461021341 in words is "one trillion, six hundred forty-three billion, four hundred sixty-one million, twenty-one thousand, three hundred forty-one".