640321449298 has 8 divisors (see below), whose sum is σ = 960490287792. Its totient is φ = 320158020036.

The previous prime is 640321449247. The next prime is 640321449343. The reversal of 640321449298 is 892944123046.

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

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, 1042140 + ... + 1538407.

It is an arithmetic number, because the mean of its divisors is an integer number (120061285974).

Almost surely, 2^640321449298 is an apocalyptic number.

640321449298 is a deficient number, since it is larger than the sum of its proper divisors (320168838494).

640321449298 is a wasteful number, since it uses less digits than its factorization.

640321449298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704616.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 640321449298 in words is "six hundred forty billion, three hundred twenty-one million, four hundred forty-nine thousand, two hundred ninety-eight".