1608964405 has 16 divisors (see below), whose sum is σ = 2050064640. Its totient is φ = 1208058112.

The previous prime is 1608964393. The next prime is 1608964429. The reversal of 1608964405 is 5044698061.

It is a cyclic number.

It is not a de Polignac number, because 1608964405 - 2¹¹ = 1608962357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4152 + ... + 56878.

It is an arithmetic number, because the mean of its divisors is an integer number (128129040).

Almost surely, 2^1608964405 is an apocalyptic number.

It is an amenable number.

1608964405 is a deficient number, since it is larger than the sum of its proper divisors (441100235).

1608964405 is a wasteful number, since it uses less digits than its factorization.

1608964405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53108.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1608964405 is about 40111.8985464413. The cubic root of 1608964405 is about 1171.7873684326.

The spelling of 1608964405 in words is "one billion, six hundred eight million, nine hundred sixty-four thousand, four hundred five".