640015011 has 12 divisors (see below), whose sum is σ = 949452192. Its totient is φ = 415144656.

The previous prime is 640015001. The next prime is 640015049. The reversal of 640015011 is 110510046.

640015011 is a `hidden beast` number, since 640 + 0 + 15 + 0 + 11 = 666.

640015011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640015011 - 2¹¹ = 640012963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640015001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 960651 + ... + 961316.

It is an arithmetic number, because the mean of its divisors is an integer number (79121016).

Almost surely, 2^640015011 is an apocalyptic number.

640015011 is a deficient number, since it is larger than the sum of its proper divisors (309437181).

640015011 is a wasteful number, since it uses less digits than its factorization.

640015011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922010 (or 1922007 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 640015011 is about 25298.5179605446. The cubic root of 640015011 is about 861.7806135057.

Adding to 640015011 its reverse (110510046), we get a palindrome (750525057).

The spelling of 640015011 in words is "six hundred forty million, fifteen thousand, eleven".