640608685119 has 80 divisors (see below), whose sum is σ = 1054358962272. Its totient is φ = 386774414208.

The previous prime is 640608685097. The next prime is 640608685151. The reversal of 640608685119 is 911586806046.

640608685119 is a `hidden beast` number, since 6 + 4 + 0 + 60 + 8 + 68 + 511 + 9 = 666.

It is not a de Polignac number, because 640608685119 - 2⁹ = 640608684607 is a prime.

It is a super-2 number, since 2×640608685119² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640608685219) 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 79 ways as a sum of consecutive naturals, for example, 13537969 + ... + 13585205.

Almost surely, 2^640608685119 is an apocalyptic number.

640608685119 is a deficient number, since it is larger than the sum of its proper divisors (413750277153).

640608685119 is an frugal number, since it uses more digits than its factorization.

640608685119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47330 (or 47306 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 640608685119 in words is "six hundred forty billion, six hundred eight million, six hundred eighty-five thousand, one hundred nineteen".