1568643396820 has 48 divisors (see below), whose sum is σ = 3467860300800. Its totient is φ = 594376237440.

The previous prime is 1568643396769. The next prime is 1568643396833. The reversal of 1568643396820 is 286933468651.

It is a super-2 number, since 2×1568643396820² (a number of 25 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3876685 + ... + 4262155.

It is an arithmetic number, because the mean of its divisors is an integer number (72247089600).

Almost surely, 2^{1568643396820} is an apocalyptic number.

1568643396820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1568643396820 is an abundant number, since it is smaller than the sum of its proper divisors (1899216903980).

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

1568643396820 is a wasteful number, since it uses less digits than its factorization.

1568643396820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396208 (or 396206 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 61.

The spelling of 1568643396820 in words is "one trillion, five hundred sixty-eight billion, six hundred forty-three million, three hundred ninety-six thousand, eight hundred twenty".