568609491840 has 256 divisors, whose sum is σ = 2054592691200. Its totient is φ = 132598702080.

The previous prime is 568609491799. The next prime is 568609491869. The reversal of 568609491840 is 48194906865.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125256 + ... + 1073735.

It is an arithmetic number, because the mean of its divisors is an integer number (8025752700).

Almost surely, 2^568609491840 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 568609491840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027296345600).

568609491840 is an abundant number, since it is smaller than the sum of its proper divisors (1485983199360).

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

568609491840 is a wasteful number, since it uses less digits than its factorization.

568609491840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199045 (or 1199033 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 568609491840 in words is "five hundred sixty-eight billion, six hundred nine million, four hundred ninety-one thousand, eight hundred forty".