640323243246 has 8 divisors (see below), whose sum is σ = 1280646486504. Its totient is φ = 213441081080.

The previous prime is 640323243233. The next prime is 640323243269. The reversal of 640323243246 is 642342323046.

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

640323243246 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53360270265 + ... + 53360270276.

It is an arithmetic number, because the mean of its divisors is an integer number (160080810813).

Almost surely, 2^640323243246 is an apocalyptic number.

640323243246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640323243246 is a wasteful number, since it uses less digits than its factorization.

640323243246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106720540546.

The product of its (nonzero) digits is 497664, while the sum is 39.

The spelling of 640323243246 in words is "six hundred forty billion, three hundred twenty-three million, two hundred forty-three thousand, two hundred forty-six".