648645143 has 8 divisors (see below), whose sum is σ = 651818256. Its totient is φ = 645480000.

The previous prime is 648645119. The next prime is 648645191. The reversal of 648645143 is 341546846.

It is a happy number.

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 648645143 - 2²² = 644450839 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 648645143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648645043) 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, 214643 + ... + 217643.

It is an arithmetic number, because the mean of its divisors is an integer number (81477282).

Almost surely, 2^648645143 is an apocalyptic number.

648645143 is a deficient number, since it is larger than the sum of its proper divisors (3173113).

648645143 is a wasteful number, since it uses less digits than its factorization.

648645143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985.

The product of its digits is 276480, while the sum is 41.

The square root of 648645143 is about 25468.5127755823. The cubic root of 648645143 is about 865.6368250858.

It can be divided in two parts, 64864 and 5143, that added together give a palindrome (70007).

The spelling of 648645143 in words is "six hundred forty-eight million, six hundred forty-five thousand, one hundred forty-three".