26845404820 has 192 divisors, whose sum is σ = 66322561536. Its totient is φ = 9036840960.

The previous prime is 26845404793. The next prime is 26845404821. The reversal of 26845404820 is 2840454862.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26845404821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26037705 + ... + 26038735.

It is an arithmetic number, because the mean of its divisors is an integer number (345430008).

Almost surely, 2^26845404820 is an apocalyptic number.

26845404820 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 26845404820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33161280768).

26845404820 is an abundant number, since it is smaller than the sum of its proper divisors (39477156716).

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

26845404820 is a wasteful number, since it uses less digits than its factorization.

26845404820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 43.

The spelling of 26845404820 in words is "twenty-six billion, eight hundred forty-five million, four hundred four thousand, eight hundred twenty".