1643461132 has 6 divisors (see below), whose sum is σ = 2876056988. Its totient is φ = 821730564.

The previous prime is 1643461129. The next prime is 1643461139. The reversal of 1643461132 is 2311643461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1643461094 and 1643461103.

It is not an unprimeable number, because it can be changed into a prime (1643461139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205432638 + ... + 205432645.

Almost surely, 2^1643461132 is an apocalyptic number.

It is an amenable number.

1643461132 is a deficient number, since it is larger than the sum of its proper divisors (1232595856).

1643461132 is a wasteful number, since it uses less digits than its factorization.

1643461132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410865287 (or 410865285 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 1643461132 is about 40539.6242212480. The cubic root of 1643461132 is about 1180.1027230309.

The spelling of 1643461132 in words is "one billion, six hundred forty-three million, four hundred sixty-one thousand, one hundred thirty-two".