26780885712 has 320 divisors, whose sum is σ = 90321600000. Its totient is φ = 7594062336.

The previous prime is 26780885699. The next prime is 26780885741. The reversal of 26780885712 is 21758808762.

26780885712 is a `hidden beast` number, since 2 + 67 + 8 + 0 + 8 + 8 + 571 + 2 = 666.

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 63 ways as a sum of consecutive naturals, for example, 22077618 + ... + 22078830.

It is an arithmetic number, because the mean of its divisors is an integer number (282255000).

Almost surely, 2^26780885712 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 26780885712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45160800000).

26780885712 is an abundant number, since it is smaller than the sum of its proper divisors (63540714288).

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

26780885712 is a wasteful number, since it uses less digits than its factorization.

26780885712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 26780885712 in words is "twenty-six billion, seven hundred eighty million, eight hundred eighty-five thousand, seven hundred twelve".