26281156440 has 768 divisors, whose sum is σ = 107864064000. Its totient is φ = 4995302400.

The previous prime is 26281156423. The next prime is 26281156463. The reversal of 26281156440 is 4465118262.

It is a happy number.

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, 59865741 + ... + 59866179.

It is an arithmetic number, because the mean of its divisors is an integer number (140448000).

Almost surely, 2^26281156440 is an apocalyptic number.

26281156440 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 26281156440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53932032000).

26281156440 is an abundant number, since it is smaller than the sum of its proper divisors (81582907560).

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

26281156440 is a wasteful number, since it uses less digits than its factorization.

26281156440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 26281156440 in words is "twenty-six billion, two hundred eighty-one million, one hundred fifty-six thousand, four hundred forty".