640500601 has 8 divisors (see below), whose sum is σ = 702785160. Its totient is φ = 580075392.

The previous prime is 640500593. The next prime is 640500607. The reversal of 640500601 is 106005046.

640500601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 105781225 + 534719376 = 10285^2 + 23124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640500601 - 2³ = 640500593 is a prime.

It is a super-2 number, since 2×640500601² = 820482039762722402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640500607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464116 + ... + 465493.

It is an arithmetic number, because the mean of its divisors is an integer number (87848145).

Almost surely, 2^640500601 is an apocalyptic number.

It is an amenable number.

640500601 is a deficient number, since it is larger than the sum of its proper divisors (62284559).

640500601 is a wasteful number, since it uses less digits than its factorization.

640500601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929675.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 640500601 is about 25308.1133433530. The cubic root of 640500601 is about 861.9985074882.

Adding to 640500601 its reverse (106005046), we get a palindrome (746505647).

The spelling of 640500601 in words is "six hundred forty million, five hundred thousand, six hundred one".