646460013 has 8 divisors (see below), whose sum is σ = 864993568. Its totient is φ = 429449904.

The previous prime is 646459973. The next prime is 646460051. The reversal of 646460013 is 310064646.

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

It is not a de Polignac number, because 646460013 - 2¹³ = 646451821 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 (646460053) 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, 379870 + ... + 381567.

It is an arithmetic number, because the mean of its divisors is an integer number (108124196).

Almost surely, 2^646460013 is an apocalyptic number.

It is an amenable number.

646460013 is a deficient number, since it is larger than the sum of its proper divisors (218533555).

646460013 is a wasteful number, since it uses less digits than its factorization.

646460013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761723.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 646460013 is about 25425.5779285349. The cubic root of 646460013 is about 864.6636905267.

The spelling of 646460013 in words is "six hundred forty-six million, four hundred sixty thousand, thirteen".