26513891712 has 576 divisors, whose sum is σ = 99254282400. Its totient is φ = 6642155520.

The previous prime is 26513891707. The next prime is 26513891731. The reversal of 26513891712 is 21719831562.

26513891712 is a `hidden beast` number, since 265 + 1 + 389 + 1 + 7 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28296108 + ... + 28297044.

Almost surely, 2^26513891712 is an apocalyptic number.

26513891712 is a gapful number since it is divisible by the number (22) 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 26513891712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49627141200).

26513891712 is an abundant number, since it is smaller than the sum of its proper divisors (72740390688).

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

26513891712 is a wasteful number, since it uses less digits than its factorization.

26513891712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 989 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 26513891712 in words is "twenty-six billion, five hundred thirteen million, eight hundred ninety-one thousand, seven hundred twelve".