65609445 has 16 divisors (see below), whose sum is σ = 114518592. Its totient is φ = 31810560.

The previous prime is 65609441. The next prime is 65609449. The reversal of 65609445 is 54490656.

It is an interprime number because it is at equal distance from previous prime (65609441) and next prime (65609449).

It is not a de Polignac number, because 65609445 - 2² = 65609441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65609441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198652 + ... + 198981.

It is an arithmetic number, because the mean of its divisors is an integer number (7157412).

Almost surely, 2^65609445 is an apocalyptic number.

It is an amenable number.

65609445 is a deficient number, since it is larger than the sum of its proper divisors (48909147).

65609445 is a wasteful number, since it uses less digits than its factorization.

65609445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397652.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 65609445 is about 8099.9657406683. The cubic root of 65609445 is about 403.3252899306.

The spelling of 65609445 in words is "sixty-five million, six hundred nine thousand, four hundred forty-five".