646274617 has 4 divisors (see below), whose sum is σ = 647299456. Its totient is φ = 645249780.

The previous prime is 646274611. The next prime is 646274623. The reversal of 646274617 is 716472646.

646274617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (646274611) and next prime (646274623).

It is a cyclic number.

It is not a de Polignac number, because 646274617 - 2³ = 646274609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646274611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511473 + ... + 512734.

It is an arithmetic number, because the mean of its divisors is an integer number (161824864).

Almost surely, 2^646274617 is an apocalyptic number.

It is an amenable number.

646274617 is a deficient number, since it is larger than the sum of its proper divisors (1024839).

646274617 is a wasteful number, since it uses less digits than its factorization.

646274617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024838.

The product of its digits is 338688, while the sum is 43.

The square root of 646274617 is about 25421.9318109384. The cubic root of 646274617 is about 864.5810246679.

The spelling of 646274617 in words is "six hundred forty-six million, two hundred seventy-four thousand, six hundred seventeen".