648832238281 has 8 divisors (see below), whose sum is σ = 650164112640. Its totient is φ = 647500531392.

The previous prime is 648832238273. The next prime is 648832238309. The reversal of 648832238281 is 182832238846.

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 648832238281 - 2³ = 648832238273 is a prime.

It is a super-2 number, since 2×648832238281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648832238221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10326960 + ... + 10389598.

It is an arithmetic number, because the mean of its divisors is an integer number (81270514080).

Almost surely, 2^648832238281 is an apocalyptic number.

It is an amenable number.

648832238281 is a deficient number, since it is larger than the sum of its proper divisors (1331874359).

648832238281 is a wasteful number, since it uses less digits than its factorization.

648832238281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83735.

The product of its digits is 7077888, while the sum is 55.

The spelling of 648832238281 in words is "six hundred forty-eight billion, eight hundred thirty-two million, two hundred thirty-eight thousand, two hundred eighty-one".