640011061711 has 6 divisors (see below), whose sum is σ = 744502663680. Its totient is φ = 548580909996.

The previous prime is 640011061709. The next prime is 640011061717. The reversal of 640011061711 is 117160110046.

It is not a de Polignac number, because 640011061711 - 2¹ = 640011061709 is a prime.

It is a super-2 number, since 2×640011061711² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640011061711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640011061717) 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 5 ways as a sum of consecutive naturals, for example, 6530725071 + ... + 6530725168.

It is an arithmetic number, because the mean of its divisors is an integer number (124083777280).

Almost surely, 2^640011061711 is an apocalyptic number.

640011061711 is a deficient number, since it is larger than the sum of its proper divisors (104491601969).

640011061711 is a wasteful number, since it uses less digits than its factorization.

640011061711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13061450253 (or 13061450246 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 640011061711 its reverse (117160110046), we get a palindrome (757171171757).

The spelling of 640011061711 in words is "six hundred forty billion, eleven million, sixty-one thousand, seven hundred eleven".