26536688640 has 1056 divisors, whose sum is σ = 119312653824. Its totient is φ = 5494210560.

The previous prime is 26536688627. The next prime is 26536688657. The reversal of 26536688640 is 4688663562.

It is a happy number.

26536688640 is a `hidden beast` number, since 2 + 6 + 536 + 68 + 8 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 95800182 + ... + 95800458.

Almost surely, 2^26536688640 is an apocalyptic number.

26536688640 is a gapful number since it is divisible by the number (20) 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 26536688640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59656326912).

26536688640 is an abundant number, since it is smaller than the sum of its proper divisors (92775965184).

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

26536688640 is a wasteful number, since it uses less digits than its factorization.

26536688640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 26536688640 in words is "twenty-six billion, five hundred thirty-six million, six hundred eighty-eight thousand, six hundred forty".