26620968780 has 576 divisors, whose sum is σ = 103783680000. Its totient is φ = 5376761856.

The previous prime is 26620968757. The next prime is 26620968823. The reversal of 26620968780 is 8786902662.

26620968780 is a `hidden beast` number, since 2 + 6 + 620 + 9 + 6 + 8 + 7 + 8 + 0 = 666.

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, 60639801 + ... + 60640239.

It is an arithmetic number, because the mean of its divisors is an integer number (180180000).

Almost surely, 2^26620968780 is an apocalyptic number.

26620968780 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 26620968780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51891840000).

26620968780 is an abundant number, since it is smaller than the sum of its proper divisors (77162711220).

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

26620968780 is a wasteful number, since it uses less digits than its factorization.

26620968780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 26620968780 in words is "twenty-six billion, six hundred twenty million, nine hundred sixty-eight thousand, seven hundred eighty".