268620264243828 has 144 divisors (see below), whose sum is σ = 817238149611520. Its totient is φ = 72675312962112.

The previous prime is 268620264243811. The next prime is 268620264243833. The reversal of 268620264243828 is 828342462026862.

268620264243828 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 202 + 6 + 42 + 4 + 382 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 47 ways as a sum of consecutive naturals, for example, 2829100 + ... + 23350467.

Almost surely, 2^{268620264243828} is an apocalyptic number.

268620264243828 is a gapful number since it is divisible by the number (28) 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 268620264243828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408619074805760).

268620264243828 is an abundant number, since it is smaller than the sum of its proper divisors (548617885367692).

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

268620264243828 is a wasteful number, since it uses less digits than its factorization.

268620264243828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181746 (or 26181741 counting only the distinct ones).

The product of its (nonzero) digits is 169869312, while the sum is 63.

The spelling of 268620264243828 in words is "two hundred sixty-eight trillion, six hundred twenty billion, two hundred sixty-four million, two hundred forty-three thousand, eight hundred twenty-eight".