640337325 has 24 divisors (see below), whose sum is σ = 1076642400. Its totient is φ = 335722560.

The previous prime is 640337311. The next prime is 640337339. The reversal of 640337325 is 523733046.

640337325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640337311) and next prime (640337339).

It is not a de Polignac number, because 640337325 - 2⁶ = 640337261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67930 + ... + 76779.

It is an arithmetic number, because the mean of its divisors is an integer number (44860100).

Almost surely, 2^640337325 is an apocalyptic number.

It is an amenable number.

640337325 is a deficient number, since it is larger than the sum of its proper divisors (436305075).

640337325 is a wasteful number, since it uses less digits than its factorization.

640337325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144781 (or 144776 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 33.

The square root of 640337325 is about 25304.8873737861. The cubic root of 640337325 is about 861.9252545622.

The spelling of 640337325 in words is "six hundred forty million, three hundred thirty-seven thousand, three hundred twenty-five".