65280609 has 12 divisors (see below), whose sum is σ = 95893200. Its totient is φ = 42782424.

The previous prime is 65280583. The next prime is 65280613. The reversal of 65280609 is 90608256.

It is not a de Polignac number, because 65280609 - 2¹¹ = 65278561 is a prime.

It is a super-2 number, since 2×65280609² = 8523115822821762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65280659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60939 + ... + 62000.

It is an arithmetic number, because the mean of its divisors is an integer number (7991100).

Almost surely, 2^65280609 is an apocalyptic number.

It is an amenable number.

65280609 is a deficient number, since it is larger than the sum of its proper divisors (30612591).

65280609 is a wasteful number, since it uses less digits than its factorization.

65280609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123004 (or 123001 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 65280609 is about 8079.6416380926. The cubic root of 65280609 is about 402.6503359305.

The spelling of 65280609 in words is "sixty-five million, two hundred eighty thousand, six hundred nine".