640119011 has 4 divisors (see below), whose sum is σ = 731564592. Its totient is φ = 548673432.

The previous prime is 640118977. The next prime is 640119041. The reversal of 640119011 is 110911046.

640119011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 640119011 - 2¹⁰ = 640117987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640119041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45722780 + ... + 45722793.

It is an arithmetic number, because the mean of its divisors is an integer number (182891148).

Almost surely, 2^640119011 is an apocalyptic number.

640119011 is a deficient number, since it is larger than the sum of its proper divisors (91445581).

640119011 is an equidigital number, since it uses as much as digits as its factorization.

640119011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91445580.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 640119011 is about 25300.5733334247. The cubic root of 640119011 is about 861.8272896660.

The spelling of 640119011 in words is "six hundred forty million, one hundred nineteen thousand, eleven".