640475072 has 14 divisors (see below), whose sum is σ = 1270942848. Its totient is φ = 320237504.

The previous prime is 640475071. The next prime is 640475111. The reversal of 640475072 is 270574046.

640475072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640475071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003648 + ... + 5003775.

It is an arithmetic number, because the mean of its divisors is an integer number (90781632).

Almost surely, 2^640475072 is an apocalyptic number.

It is an amenable number.

640475072 is a deficient number, since it is larger than the sum of its proper divisors (630467776).

640475072 is a wasteful number, since it uses less digits than its factorization.

640475072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10007435 (or 10007425 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 640475072 is about 25307.6089743776. The cubic root of 640475072 is about 861.9870548566.

The spelling of 640475072 in words is "six hundred forty million, four hundred seventy-five thousand, seventy-two".