1565163145 has 24 divisors (see below), whose sum is σ = 2352909384. Its totient is φ = 990694656.

The previous prime is 1565163101. The next prime is 1565163161. The reversal of 1565163145 is 5413615651.

It can be written as a sum of positive squares in 4 ways, for example, as 377602624 + 1187560521 = 19432^2 + 34461^2 .

It is not a de Polignac number, because 1565163145 - 2²⁵ = 1531608713 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 242524 + ... + 248893.

It is an arithmetic number, because the mean of its divisors is an integer number (98037891).

Almost surely, 2^1565163145 is an apocalyptic number.

It is an amenable number.

1565163145 is a deficient number, since it is larger than the sum of its proper divisors (787746239).

1565163145 is a wasteful number, since it uses less digits than its factorization.

1565163145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491449 (or 491442 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 1565163145 is about 39562.1428261918. The cubic root of 1565163145 is about 1161.0560994891.

Adding to 1565163145 its reverse (5413615651), we get a palindrome (6978778796).

The spelling of 1565163145 in words is "one billion, five hundred sixty-five million, one hundred sixty-three thousand, one hundred forty-five".