1564745344 has 64 divisors (see below), whose sum is σ = 3243110400. Its totient is φ = 751098880.

The previous prime is 1564745333. The next prime is 1564745353. The reversal of 1564745344 is 4435474651.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1564745344.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707889 + ... + 710095.

It is an arithmetic number, because the mean of its divisors is an integer number (50673600).

Almost surely, 2^1564745344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1564745344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621555200).

1564745344 is an abundant number, since it is smaller than the sum of its proper divisors (1678365056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1564745344 is a wasteful number, since it uses less digits than its factorization.

1564745344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2429 counting only the distinct ones).

The product of its digits is 806400, while the sum is 43.

The square root of 1564745344 is about 39556.8621606922. The cubic root of 1564745344 is about 1160.9527804261.

The spelling of 1564745344 in words is "one billion, five hundred sixty-four million, seven hundred forty-five thousand, three hundred forty-four".