640620152611 has 8 divisors (see below), whose sum is σ = 670207696704. Its totient is φ = 611697497280.

The previous prime is 640620152609. The next prime is 640620152707. The reversal of 640620152611 is 116251026046.

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 640620152611 - 2¹ = 640620152609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640320152611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166220220 + ... + 166224073.

It is an arithmetic number, because the mean of its divisors is an integer number (83775962088).

Almost surely, 2^640620152611 is an apocalyptic number.

640620152611 is a deficient number, since it is larger than the sum of its proper divisors (29587544093).

640620152611 is a wasteful number, since it uses less digits than its factorization.

640620152611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332444381.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 640620152611 its reverse (116251026046), we get a palindrome (756871178657).

The spelling of 640620152611 in words is "six hundred forty billion, six hundred twenty million, one hundred fifty-two thousand, six hundred eleven".