640314152 has 8 divisors (see below), whose sum is σ = 1200589050. Its totient is φ = 320157072.

The previous prime is 640314151. The next prime is 640314167. The reversal of 640314152 is 251413046.

It can be written as a sum of positive squares in only one way, i.e., 331749796 + 308564356 = 18214^2 + 17566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (640314151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40019627 + ... + 40019642.

Almost surely, 2^640314152 is an apocalyptic number.

It is an amenable number.

640314152 is a deficient number, since it is larger than the sum of its proper divisors (560274898).

640314152 is a wasteful number, since it uses less digits than its factorization.

640314152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80039275 (or 80039271 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 640314152 is about 25304.4294936677. The cubic root of 640314152 is about 861.9148571076.

Adding to 640314152 its reverse (251413046), we get a palindrome (891727198).

The spelling of 640314152 in words is "six hundred forty million, three hundred fourteen thousand, one hundred fifty-two".