648537911 has 8 divisors (see below), whose sum is σ = 758423424. Its totient is φ = 542961720.

The previous prime is 648537907. The next prime is 648537917. The reversal of 648537911 is 119735846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648537911 - 2² = 648537907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648537917) 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, 1077005 + ... + 1077606.

It is an arithmetic number, because the mean of its divisors is an integer number (94802928).

Almost surely, 2^648537911 is an apocalyptic number.

648537911 is a deficient number, since it is larger than the sum of its proper divisors (109885513).

648537911 is a wasteful number, since it uses less digits than its factorization.

648537911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154661.

The product of its digits is 181440, while the sum is 44.

The square root of 648537911 is about 25466.4075008628. The cubic root of 648537911 is about 865.5891209933.

The spelling of 648537911 in words is "six hundred forty-eight million, five hundred thirty-seven thousand, nine hundred eleven".