1565130320 has 160 divisors (see below), whose sum is σ = 4170566400. Its totient is φ = 541458432.

The previous prime is 1565130277. The next prime is 1565130337. The reversal of 1565130320 is 230315651.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1565130320.

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 31 ways as a sum of consecutive naturals, for example, 2034896 + ... + 2035664.

It is an arithmetic number, because the mean of its divisors is an integer number (26066040).

Almost surely, 2^1565130320 is an apocalyptic number.

1565130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1565130320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2085283200).

1565130320 is an abundant number, since it is smaller than the sum of its proper divisors (2605436080).

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

1565130320 is a wasteful number, since it uses less digits than its factorization.

1565130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1565130320 is about 39561.7279703503. The cubic root of 1565130320 is about 1161.0479827776.

Adding to 1565130320 its reverse (230315651), we get a palindrome (1795445971).

The spelling of 1565130320 in words is "one billion, five hundred sixty-five million, one hundred thirty thousand, three hundred twenty".