1565663141 has 12 divisors (see below), whose sum is σ = 1822193100. Its totient is φ = 1341325440.

The previous prime is 1565663119. The next prime is 1565663173. The reversal of 1565663141 is 1413665651.

It can be written as a sum of positive squares in 2 ways, for example, as 549902500 + 1015760641 = 23450^2 + 31871^2 .

It is not a de Polignac number, because 1565663141 - 2¹⁴ = 1565646757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1565663095 and 1565663104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565663101) by changing a digit.

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, 107885 + ... + 121533.

It is an arithmetic number, because the mean of its divisors is an integer number (151849425).

Almost surely, 2^1565663141 is an apocalyptic number.

It is an amenable number.

1565663141 is a deficient number, since it is larger than the sum of its proper divisors (256529959).

1565663141 is a wasteful number, since it uses less digits than its factorization.

1565663141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16004 (or 15997 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 1565663141 is about 39568.4614434274. The cubic root of 1565663141 is about 1161.1797205957.

The spelling of 1565663141 in words is "one billion, five hundred sixty-five million, six hundred sixty-three thousand, one hundred forty-one".