1965525489 has 18 divisors (see below), whose sum is σ = 2940379286. Its totient is φ = 1265160960.

The previous prime is 1965525473. The next prime is 1965525521. The reversal of 1965525489 is 9845255691.

1965525489 is a `hidden beast` number, since 1 + 9 + 6 + 552 + 5 + 4 + 89 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 16744464 + 1948781025 = 4092^2 + 44145^2 .

It is not a de Polignac number, because 1965525489 - 2⁴ = 1965525473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965525449) 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 17 ways as a sum of consecutive naturals, for example, 122272 + ... + 137409.

Almost surely, 2^1965525489 is an apocalyptic number.

It is an amenable number.

1965525489 is a deficient number, since it is larger than the sum of its proper divisors (974853797).

1965525489 is a wasteful number, since it uses less digits than its factorization.

1965525489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259745 (or 259713 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 54.

The square root of 1965525489 is about 44334.2473602519. The cubic root of 1965525489 is about 1252.6398586457.

The spelling of 1965525489 in words is "one billion, nine hundred sixty-five million, five hundred twenty-five thousand, four hundred eighty-nine".