65344645 has 4 divisors (see below), whose sum is σ = 78413580. Its totient is φ = 52275712.

The previous prime is 65344639. The next prime is 65344681. The reversal of 65344645 is 54644356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24780484 + 40564161 = 4978^2 + 6369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65344645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6534460 + ... + 6534469.

It is an arithmetic number, because the mean of its divisors is an integer number (19603395).

Almost surely, 2^65344645 is an apocalyptic number.

It is an amenable number.

65344645 is a deficient number, since it is larger than the sum of its proper divisors (13068935).

65344645 is a wasteful number, since it uses less digits than its factorization.

65344645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13068934.

The product of its digits is 172800, while the sum is 37.

The square root of 65344645 is about 8083.6034662767. The cubic root of 65344645 is about 402.7819507702.

The spelling of 65344645 in words is "sixty-five million, three hundred forty-four thousand, six hundred forty-five".