1643104552 has 8 divisors (see below), whose sum is σ = 3080821050. Its totient is φ = 821552272.

The previous prime is 1643104549. The next prime is 1643104579. The reversal of 1643104552 is 2554013461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1382798596 + 260305956 = 37186^2 + 16134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102694027 + ... + 102694042.

Almost surely, 2^1643104552 is an apocalyptic number.

It is an amenable number.

1643104552 is a deficient number, since it is larger than the sum of its proper divisors (1437716498).

1643104552 is a wasteful number, since it uses less digits than its factorization.

1643104552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205388075 (or 205388071 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1643104552 is about 40535.2260632650. The cubic root of 1643104552 is about 1180.0173683166.

The spelling of 1643104552 in words is "one billion, six hundred forty-three million, one hundred four thousand, five hundred fifty-two".