645797746 has 8 divisors (see below), whose sum is σ = 1056759984. Its totient is φ = 293544420.

The previous prime is 645797701. The next prime is 645797833. The reversal of 645797746 is 647797546.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14677200 + ... + 14677243.

It is an arithmetic number, because the mean of its divisors is an integer number (132094998).

Almost surely, 2^645797746 is an apocalyptic number.

645797746 is a deficient number, since it is larger than the sum of its proper divisors (410962238).

645797746 is a wasteful number, since it uses less digits than its factorization.

645797746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29354456.

The product of its digits is 8890560, while the sum is 55.

The square root of 645797746 is about 25412.5509542037. The cubic root of 645797746 is about 864.3683209370.

The spelling of 645797746 in words is "six hundred forty-five million, seven hundred ninety-seven thousand, seven hundred forty-six".