1608513968 has 20 divisors (see below), whose sum is σ = 3192509208. Its totient is φ = 784640640.

The previous prime is 1608513961. The next prime is 1608513983. The reversal of 1608513968 is 8693158061.

It is a super-2 number, since 2×1608513968² = 5174634370502210048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1608513961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225346 + ... + 1226657.

Almost surely, 2^1608513968 is an apocalyptic number.

It is an amenable number.

1608513968 is a deficient number, since it is larger than the sum of its proper divisors (1583995240).

1608513968 is a wasteful number, since it uses less digits than its factorization.

1608513968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452052 (or 2452046 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1608513968 is about 40106.2833979914. The cubic root of 1608513968 is about 1171.6780091355.

The spelling of 1608513968 in words is "one billion, six hundred eight million, five hundred thirteen thousand, nine hundred sixty-eight".