646627601 has 8 divisors (see below), whose sum is σ = 656294400. Its totient is φ = 636976480.

The previous prime is 646627591. The next prime is 646627603. The reversal of 646627601 is 106726646.

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 646627601 - 2⁶ = 646627537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646627603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99005 + ... + 105333.

It is an arithmetic number, because the mean of its divisors is an integer number (82036800).

Almost surely, 2^646627601 is an apocalyptic number.

It is an amenable number.

646627601 is a deficient number, since it is larger than the sum of its proper divisors (9666799).

646627601 is a wasteful number, since it uses less digits than its factorization.

646627601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 646627601 is about 25428.8733726054. The cubic root of 646627601 is about 864.7384024117.

The spelling of 646627601 in words is "six hundred forty-six million, six hundred twenty-seven thousand, six hundred one".