612345644 has 24 divisors (see below), whose sum is σ = 1144695888. Its totient is φ = 285608960.

The previous prime is 612345611. The next prime is 612345647. The reversal of 612345644 is 446543216.

It is not an unprimeable number, because it can be changed into a prime (612345647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32162 + ... + 47529.

It is an arithmetic number, because the mean of its divisors is an integer number (47695662).

Almost surely, 2^612345644 is an apocalyptic number.

It is an amenable number.

612345644 is a deficient number, since it is larger than the sum of its proper divisors (532350244).

612345644 is a wasteful number, since it uses less digits than its factorization.

612345644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79825 (or 79823 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 612345644 is about 24745.6186829103. The cubic root of 612345644 is about 849.1782803856.

The spelling of 612345644 in words is "six hundred twelve million, three hundred forty-five thousand, six hundred forty-four".