640155345314 has 8 divisors (see below), whose sum is σ = 960251447340. Its totient is φ = 320071529536.

The previous prime is 640155345257. The next prime is 640155345317. The reversal of 640155345314 is 413543551046.

It can be written as a sum of positive squares in 2 ways, for example, as 597477983089 + 42677362225 = 772967^2 + 206585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×640155345314² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (640155345317) 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 3 ways as a sum of consecutive naturals, for example, 2940179 + ... + 3150390.

Almost surely, 2^640155345314 is an apocalyptic number.

640155345314 is a deficient number, since it is larger than the sum of its proper divisors (320096102026).

640155345314 is a wasteful number, since it uses less digits than its factorization.

640155345314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143124.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 640155345314 in words is "six hundred forty billion, one hundred fifty-five million, three hundred forty-five thousand, three hundred fourteen".