26640222912 has 168 divisors, whose sum is σ = 81303217632. Its totient is φ = 8310988800.

The previous prime is 26640222911. The next prime is 26640222941. The reversal of 26640222912 is 21922204662.

It is a happy number.

26640222912 is a `hidden beast` number, since 2 + 6 + 640 + 2 + 2 + 2 + 9 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (26640222911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1764837 + ... + 1779867.

It is an arithmetic number, because the mean of its divisors is an integer number (483947724).

Almost surely, 2^26640222912 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 26640222912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40651608816).

26640222912 is an abundant number, since it is smaller than the sum of its proper divisors (54662994720).

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

26640222912 is a wasteful number, since it uses less digits than its factorization.

26640222912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15247 (or 15234 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 26640222912 in words is "twenty-six billion, six hundred forty million, two hundred twenty-two thousand, nine hundred twelve".