64336645 has 8 divisors (see below), whose sum is σ = 79866360. Its totient is φ = 49694400.

The previous prime is 64336633. The next prime is 64336669. The reversal of 64336645 is 54663346.

It can be written as a sum of positive squares in 4 ways, for example, as 14760964 + 49575681 = 3842^2 + 7041^2 .

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

It is not a de Polignac number, because 64336645 - 2¹⁷ = 64205573 is a prime.

It is a congruent number.

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, 221706 + ... + 221995.

It is an arithmetic number, because the mean of its divisors is an integer number (9983295).

Almost surely, 2^64336645 is an apocalyptic number.

It is an amenable number.

64336645 is a deficient number, since it is larger than the sum of its proper divisors (15529715).

64336645 is a wasteful number, since it uses less digits than its factorization.

64336645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443735.

The product of its digits is 155520, while the sum is 37.

The square root of 64336645 is about 8021.0127166088. The cubic root of 64336645 is about 400.7001176233.

The spelling of 64336645 in words is "sixty-four million, three hundred thirty-six thousand, six hundred forty-five".