640526552752000 has 128 divisors (see below), whose sum is σ = 1592584834726080. Its totient is φ = 256198443264000.

The previous prime is 640526552751997. The next prime is 640526552752003. The reversal of 640526552752000 is 257255625046.

It is an interprime number because it is at equal distance from previous prime (640526552751997) and next prime (640526552752003).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640526552752003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339491245 + ... + 341372755.

Almost surely, 2^{640526552752000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640526552752000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796292417363040).

640526552752000 is an abundant number, since it is smaller than the sum of its proper divisors (952058281974080).

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

640526552752000 is a wasteful number, since it uses less digits than its factorization.

640526552752000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902817 (or 1902795 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 49.

The spelling of 640526552752000 in words is "six hundred forty trillion, five hundred twenty-six billion, five hundred fifty-two million, seven hundred fifty-two thousand".