640130653 has 8 divisors (see below), whose sum is σ = 674810720. Its totient is φ = 605549520.

The previous prime is 640130651. The next prime is 640130677. The reversal of 640130653 is 356031046.

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

It is a cyclic number.

It is not a de Polignac number, because 640130653 - 2¹ = 640130651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640130651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 37507.

It is an arithmetic number, because the mean of its divisors is an integer number (84351340).

Almost surely, 2^640130653 is an apocalyptic number.

It is an amenable number.

640130653 is a deficient number, since it is larger than the sum of its proper divisors (34680067).

640130653 is a wasteful number, since it uses less digits than its factorization.

640130653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49467.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 640130653 is about 25300.8034062162. The cubic root of 640130653 is about 861.8325143884.

Adding to 640130653 its reverse (356031046), we get a palindrome (996161699).

The spelling of 640130653 in words is "six hundred forty million, one hundred thirty thousand, six hundred fifty-three".