648788011 has 8 divisors (see below), whose sum is σ = 659020320. Its totient is φ = 638592192.

The previous prime is 648787991. The next prime is 648788027. The reversal of 648788011 is 110887846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648788011 is a prime.

It is a super-2 number, since 2×648788011² = 841851766434672242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648788911) 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, 27885 + ... + 45553.

It is an arithmetic number, because the mean of its divisors is an integer number (82377540).

Almost surely, 2^648788011 is an apocalyptic number.

648788011 is a deficient number, since it is larger than the sum of its proper divisors (10232309).

648788011 is a wasteful number, since it uses less digits than its factorization.

648788011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18245.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 648788011 is about 25471.3174178329. The cubic root of 648788011 is about 865.7003743286.

The spelling of 648788011 in words is "six hundred forty-eight million, seven hundred eighty-eight thousand, eleven".