640453579584 has 1008 divisors, whose sum is σ = 2340411554880. Its totient is φ = 152769576960.

The previous prime is 640453579567. The next prime is 640453579681. The reversal of 640453579584 is 485975354046.

It is a happy number.

It is a super-2 number, since 2×640453579584² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1229277244 + ... + 1229277764.

It is an arithmetic number, because the mean of its divisors is an integer number (2321836860).

Almost surely, 2^640453579584 is an apocalyptic number.

640453579584 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640453579584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170205777440).

640453579584 is an abundant number, since it is smaller than the sum of its proper divisors (1699957975296).

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

640453579584 is a wasteful number, since it uses less digits than its factorization.

640453579584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 60.

The spelling of 640453579584 in words is "six hundred forty billion, four hundred fifty-three million, five hundred seventy-nine thousand, five hundred eighty-four".