640144152 has 48 divisors (see below), whose sum is σ = 1776017880. Its totient is φ = 208176000.

The previous prime is 640144151. The next prime is 640144171. The reversal of 640144152 is 251441046.

640144152 is a `hidden beast` number, since 640 + 1 + 4 + 4 + 15 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640144151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105474 + ... + 111377.

Almost surely, 2^640144152 is an apocalyptic number.

It is an amenable number.

640144152 is an abundant number, since it is smaller than the sum of its proper divisors (1135873728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640144152 is a wasteful number, since it uses less digits than its factorization.

640144152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216904 (or 216897 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 640144152 is about 25301.0701749946. The cubic root of 640144152 is about 861.8385724201.

Adding to 640144152 its reverse (251441046), we get a palindrome (891585198).

The spelling of 640144152 in words is "six hundred forty million, one hundred forty-four thousand, one hundred fifty-two".