640910576 has 10 divisors (see below), whose sum is σ = 1241764272. Its totient is φ = 320455280.

The previous prime is 640910573. The next prime is 640910629. The reversal of 640910576 is 675019046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640910573) 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, 20028440 + ... + 20028471.

Almost surely, 2^640910576 is an apocalyptic number.

It is an amenable number.

640910576 is a deficient number, since it is larger than the sum of its proper divisors (600853696).

640910576 is a wasteful number, since it uses less digits than its factorization.

640910576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056919 (or 40056913 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 640910576 is about 25316.2117229257. The cubic root of 640910576 is about 862.1823857770.

The spelling of 640910576 in words is "six hundred forty million, nine hundred ten thousand, five hundred seventy-six".