26891487168 has 448 divisors, whose sum is σ = 91324907520. Its totient is φ = 6793113600.

The previous prime is 26891487157. The next prime is 26891487229. The reversal of 26891487168 is 86178419862.

It is a tau number, because it is divible by the number of its divisors (448).

Its product of digits (9289728) is a multiple of the sum of its prime factors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70953603 + ... + 70953981.

It is an arithmetic number, because the mean of its divisors is an integer number (203850240).

Almost surely, 2^26891487168 is an apocalyptic number.

26891487168 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 26891487168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45662453760).

26891487168 is an abundant number, since it is smaller than the sum of its proper divisors (64433420352).

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

26891487168 is a wasteful number, since it uses less digits than its factorization.

26891487168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 566 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The spelling of 26891487168 in words is "twenty-six billion, eight hundred ninety-one million, four hundred eighty-seven thousand, one hundred sixty-eight".