1645338364 has 36 divisors (see below), whose sum is σ = 3113093088. Its totient is φ = 760334400.

The previous prime is 1645338341. The next prime is 1645338389. The reversal of 1645338364 is 4638335461.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1645338364.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45309 + ... + 73099.

It is an arithmetic number, because the mean of its divisors is an integer number (86474808).

Almost surely, 2^1645338364 is an apocalyptic number.

It is an amenable number.

1645338364 is a deficient number, since it is larger than the sum of its proper divisors (1467754724).

1645338364 is a wasteful number, since it uses less digits than its factorization.

1645338364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27874 (or 27853 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 1645338364 is about 40562.7706647364. The cubic root of 1645338364 is about 1180.5518734258.

The spelling of 1645338364 in words is "one billion, six hundred forty-five million, three hundred thirty-eight thousand, three hundred sixty-four".