1641066543 has 6 divisors (see below), whose sum is σ = 2370429464. Its totient is φ = 1094044356.

The previous prime is 1641066541. The next prime is 1641066599. The reversal of 1641066543 is 3456601461.

It is a happy number.

1641066543 is a `hidden beast` number, since 1 + 6 + 4 + 106 + 6 + 543 = 666.

It is not a de Polignac number, because 1641066543 - 2¹ = 1641066541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1641066498 and 1641066507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641066541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91170355 + ... + 91170372.

Almost surely, 2^1641066543 is an apocalyptic number.

1641066543 is a deficient number, since it is larger than the sum of its proper divisors (729362921).

1641066543 is a wasteful number, since it uses less digits than its factorization.

1641066543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182340733 (or 182340730 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1641066543 is about 40510.0795234964. The cubic root of 1641066543 is about 1179.5292920523.

The spelling of 1641066543 in words is "one billion, six hundred forty-one million, sixty-six thousand, five hundred forty-three".