647645144653 has 8 divisors (see below), whose sum is σ = 698522378400. Its totient is φ = 596919107568.

The previous prime is 647645144639. The next prime is 647645144767. The reversal of 647645144653 is 356441546746.

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 647645144653 - 2¹⁷ = 647645013581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647645144594 and 647645144603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647645144623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37790263 + ... + 37807396.

It is an arithmetic number, because the mean of its divisors is an integer number (87315297300).

Almost surely, 2^647645144653 is an apocalyptic number.

It is an amenable number.

647645144653 is a deficient number, since it is larger than the sum of its proper divisors (50877233747).

647645144653 is a wasteful number, since it uses less digits than its factorization.

647645144653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75598331.

The product of its digits is 29030400, while the sum is 55.

The spelling of 647645144653 in words is "six hundred forty-seven billion, six hundred forty-five million, one hundred forty-four thousand, six hundred fifty-three".