640852510 has 16 divisors (see below), whose sum is σ = 1166497200. Its totient is φ = 253460416.

The previous prime is 640852483. The next prime is 640852517. The reversal of 640852510 is 15258046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640852517) 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 in 7 ways as a sum of consecutive naturals, for example, 359140 + ... + 360919.

It is an arithmetic number, because the mean of its divisors is an integer number (72906075).

Almost surely, 2^640852510 is an apocalyptic number.

640852510 is a deficient number, since it is larger than the sum of its proper divisors (525644690).

640852510 is a wasteful number, since it uses less digits than its factorization.

640852510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720155.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 640852510 is about 25315.0648823976. The cubic root of 640852510 is about 862.1563473059.

The spelling of 640852510 in words is "six hundred forty million, eight hundred fifty-two thousand, five hundred ten".