646755613153 has 8 divisors (see below), whose sum is σ = 696512313896. Its totient is φ = 596999808000.

The previous prime is 646755613139. The next prime is 646755613183. The reversal of 646755613153 is 351316557646.

It can be written as a sum of positive squares in 4 ways, for example, as 11087458209 + 635668154944 = 105297^2 + 797288^2 .

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 646755613153 - 2⁹ = 646755612641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646755613153.

It is not an unprimeable number, because it can be changed into a prime (646755613103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2536603 + ... + 2779903.

It is an arithmetic number, because the mean of its divisors is an integer number (87064039237).

Almost surely, 2^646755613153 is an apocalyptic number.

It is an amenable number.

646755613153 is a deficient number, since it is larger than the sum of its proper divisors (49756700743).

646755613153 is a wasteful number, since it uses less digits than its factorization.

646755613153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447795.

The product of its digits is 6804000, while the sum is 52.

The spelling of 646755613153 in words is "six hundred forty-six billion, seven hundred fifty-five million, six hundred thirteen thousand, one hundred fifty-three".