1608896642 has 4 divisors (see below), whose sum is σ = 2413344966. Its totient is φ = 804448320.

The previous prime is 1608896633. The next prime is 1608896647. The reversal of 1608896642 is 2466988061.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1597680841 + 11215801 = 39971^2 + 3349^2 .

It is not an unprimeable number, because it can be changed into a prime (1608896647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402224159 + ... + 402224162.

Almost surely, 2^1608896642 is an apocalyptic number.

1608896642 is a deficient number, since it is larger than the sum of its proper divisors (804448324).

1608896642 is an equidigital number, since it uses as much as digits as its factorization.

1608896642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804448323.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 1608896642 is about 40111.0538629939. The cubic root of 1608896642 is about 1171.7709179046.

The spelling of 1608896642 in words is "one billion, six hundred eight million, eight hundred ninety-six thousand, six hundred forty-two".