640248470213 has 8 divisors (see below), whose sum is σ = 698763189216. Its totient is φ = 581785470000.

The previous prime is 640248470171. The next prime is 640248470237. The reversal of 640248470213 is 312074842046.

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 640248470213 - 2³² = 635953502917 is a prime.

It is a super-2 number, since 2×640248470213² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640248470263) 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, 12903806 + ... + 12953327.

It is an arithmetic number, because the mean of its divisors is an integer number (87345398652).

Almost surely, 2^640248470213 is an apocalyptic number.

It is an amenable number.

640248470213 is a deficient number, since it is larger than the sum of its proper divisors (58514719003).

640248470213 is a wasteful number, since it uses less digits than its factorization.

640248470213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25859395.

The product of its (nonzero) digits is 258048, while the sum is 41.

The spelling of 640248470213 in words is "six hundred forty billion, two hundred forty-eight million, four hundred seventy thousand, two hundred thirteen".