640501103 has 8 divisors (see below), whose sum is σ = 698968656. Its totient is φ = 582073600.

The previous prime is 640501097. The next prime is 640501133. The reversal of 640501103 is 301105046.

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 640501103 - 2¹² = 640497007 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 (640501133) 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, 30623 + ... + 47103.

It is an arithmetic number, because the mean of its divisors is an integer number (87371082).

Almost surely, 2^640501103 is an apocalyptic number.

640501103 is a deficient number, since it is larger than the sum of its proper divisors (58467553).

640501103 is a wasteful number, since it uses less digits than its factorization.

640501103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20025.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 640501103 is about 25308.1232611191. The cubic root of 640501103 is about 861.9987326887.

Adding to 640501103 its reverse (301105046), we get a palindrome (941606149).

The spelling of 640501103 in words is "six hundred forty million, five hundred one thousand, one hundred three".