65009641 has 8 divisors (see below), whose sum is σ = 67854024. Its totient is φ = 62225280.

The previous prime is 65009627. The next prime is 65009647. The reversal of 65009641 is 14690056.

It can be written as a sum of positive squares in 4 ways, for example, as 13169641 + 51840000 = 3629^2 + 7200^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65009641 - 2²⁵ = 31455209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65009647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12786 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (8481753).

Almost surely, 2^65009641 is an apocalyptic number.

It is an amenable number.

65009641 is a deficient number, since it is larger than the sum of its proper divisors (2844383).

65009641 is a wasteful number, since it uses less digits than its factorization.

65009641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30011.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 65009641 is about 8062.8556355673. The cubic root of 65009641 is about 402.0924537567.

Adding to 65009641 its reverse (14690056), we get a palindrome (79699697).

The spelling of 65009641 in words is "sixty-five million, nine thousand, six hundred forty-one".