646016101 has 8 divisors (see below), whose sum is σ = 656096000. Its totient is φ = 635983920.

The previous prime is 646016089. The next prime is 646016113. The reversal of 646016101 is 101610646.

It is an interprime number because it is at equal distance from previous prime (646016089) and next prime (646016113).

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 646016101 - 2¹³ = 646007909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646013101) 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, 15856 + ... + 39286.

It is an arithmetic number, because the mean of its divisors is an integer number (82012000).

Almost surely, 2^646016101 is an apocalyptic number.

It is an amenable number.

646016101 is a deficient number, since it is larger than the sum of its proper divisors (10079899).

646016101 is a wasteful number, since it uses less digits than its factorization.

646016101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23859.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 646016101 is about 25416.8467949901. The cubic root of 646016101 is about 864.4657290796.

Adding to 646016101 its reverse (101610646), we get a palindrome (747626747).

The spelling of 646016101 in words is "six hundred forty-six million, sixteen thousand, one hundred one".