64844545 has 8 divisors (see below), whose sum is σ = 82390824. Its totient is φ = 48824064.

The previous prime is 64844531. The next prime is 64844561. The reversal of 64844545 is 54544846.

It can be written as a sum of positive squares in 4 ways, for example, as 588289 + 64256256 = 767^2 + 8016^2 .

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 64844545 - 2¹⁵ = 64811777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64844498 and 64844507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381354 + ... + 381523.

It is an arithmetic number, because the mean of its divisors is an integer number (10298853).

Almost surely, 2^64844545 is an apocalyptic number.

It is an amenable number.

64844545 is a deficient number, since it is larger than the sum of its proper divisors (17546279).

64844545 is a wasteful number, since it uses less digits than its factorization.

64844545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762899.

The product of its digits is 307200, while the sum is 40.

The square root of 64844545 is about 8052.6110672253. The cubic root of 64844545 is about 401.7517856679.

The spelling of 64844545 in words is "sixty-four million, eight hundred forty-four thousand, five hundred forty-five".