26720751777720 has 768 divisors, whose sum is σ = 110968054686720. Its totient is φ = 5006056366080.

The previous prime is 26720751777691. The next prime is 26720751777739. The reversal of 26720751777720 is 2777715702762.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 56581612 + ... + 57051908.

It is an arithmetic number, because the mean of its divisors is an integer number (144489654540).

Almost surely, 2^{26720751777720} is an apocalyptic number.

26720751777720 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 26720751777720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55484027343360).

26720751777720 is an abundant number, since it is smaller than the sum of its proper divisors (84247302909000).

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

26720751777720 is a wasteful number, since it uses less digits than its factorization.

26720751777720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470396 (or 470381 counting only the distinct ones).

The product of its (nonzero) digits is 28235760, while the sum is 60.

The spelling of 26720751777720 in words is "twenty-six trillion, seven hundred twenty billion, seven hundred fifty-one million, seven hundred seventy-seven thousand, seven hundred twenty".