26868004957656 has 128 divisors (see below), whose sum is σ = 75760488576000. Its totient is φ = 8820791312256.

The previous prime is 26868004957613. The next prime is 26868004957663. The reversal of 26868004957656 is 65675940086862.

26868004957656 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 8 + 0 + 0 + 49 + 576 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 84343030 + ... + 84660986.

It is an arithmetic number, because the mean of its divisors is an integer number (591878817000).

Almost surely, 2^{26868004957656} 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 26868004957656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37880244288000).

26868004957656 is an abundant number, since it is smaller than the sum of its proper divisors (48892483618344).

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

26868004957656 is a wasteful number, since it uses less digits than its factorization.

26868004957656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323878 (or 323868 counting only the distinct ones).

The product of its (nonzero) digits is 1045094400, while the sum is 72.

The spelling of 26868004957656 in words is "twenty-six trillion, eight hundred sixty-eight billion, four million, nine hundred fifty-seven thousand, six hundred fifty-six".