64612609 has 8 divisors (see below), whose sum is σ = 67435560. Its totient is φ = 61829376.

The previous prime is 64612601. The next prime is 64612657. The reversal of 64612609 is 90621646.

64612609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2250000 + 62362609 = 1500^2 + 7897^2 .

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 64612609 - 2³ = 64612601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64612601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6582 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (8429445).

Almost surely, 2^64612609 is an apocalyptic number.

It is an amenable number.

64612609 is a deficient number, since it is larger than the sum of its proper divisors (2822951).

64612609 is a wasteful number, since it uses less digits than its factorization.

64612609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19859.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 64612609 is about 8038.1968749216. The cubic root of 64612609 is about 401.2722181128.

The spelling of 64612609 in words is "sixty-four million, six hundred twelve thousand, six hundred nine".