640740755183 has 8 divisors (see below), whose sum is σ = 653440953600. Its totient is φ = 628063177248.

The previous prime is 640740755153. The next prime is 640740755191. The reversal of 640740755183 is 381557047046.

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 640740755183 - 2⁶ = 640740755119 is a prime.

It is a super-2 number, since 2×640740755183² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640740755153) 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 7 ways as a sum of consecutive naturals, for example, 5597903 + ... + 5711216.

It is an arithmetic number, because the mean of its divisors is an integer number (81680119200).

Almost surely, 2^640740755183 is an apocalyptic number.

640740755183 is a deficient number, since it is larger than the sum of its proper divisors (12700198417).

640740755183 is a wasteful number, since it uses less digits than its factorization.

640740755183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11310241.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 640740755183 in words is "six hundred forty billion, seven hundred forty million, seven hundred fifty-five thousand, one hundred eighty-three".