1643165362 has 16 divisors (see below), whose sum is σ = 2610490680. Its totient is φ = 773029888.

The previous prime is 1643165341. The next prime is 1643165369. The reversal of 1643165362 is 2635613461.

It can be written as a sum of positive squares in 4 ways, for example, as 1640169001 + 2996361 = 40499^2 + 1731^2 .

It is not an unprimeable number, because it can be changed into a prime (1643165369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203058 + ... + 210994.

Almost surely, 2^1643165362 is an apocalyptic number.

1643165362 is a deficient number, since it is larger than the sum of its proper divisors (967325318).

1643165362 is a wasteful number, since it uses less digits than its factorization.

1643165362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14045.

The product of its digits is 77760, while the sum is 37.

The square root of 1643165362 is about 40535.9761446545. The cubic root of 1643165362 is about 1180.0319253069.

The spelling of 1643165362 in words is "one billion, six hundred forty-three million, one hundred sixty-five thousand, three hundred sixty-two".