640266012011 has 8 divisors (see below), whose sum is σ = 644006663280. Its totient is φ = 636525817312.

The previous prime is 640266011999. The next prime is 640266012037. The reversal of 640266012011 is 110210662046.

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 640266012011 - 2¹⁰ = 640266010987 is a prime.

It is a super-2 number, since 2×640266012011² (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 (640266012041) 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, 2935901 + ... + 3146433.

It is an arithmetic number, because the mean of its divisors is an integer number (80500832910).

Almost surely, 2^640266012011 is an apocalyptic number.

640266012011 is a deficient number, since it is larger than the sum of its proper divisors (3740651269).

640266012011 is a wasteful number, since it uses less digits than its factorization.

640266012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228285.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 640266012011 its reverse (110210662046), we get a palindrome (750476674057).

The spelling of 640266012011 in words is "six hundred forty billion, two hundred sixty-six million, twelve thousand, eleven".