26563501320 has 128 divisors (see below), whose sum is σ = 83530137600. Its totient is φ = 6745077504.

The previous prime is 26563501303. The next prime is 26563501333. The reversal of 26563501320 is 2310536562.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593901 + ... + 637059.

It is an arithmetic number, because the mean of its divisors is an integer number (652579200).

Almost surely, 2^26563501320 is an apocalyptic number.

26563501320 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 26563501320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41765068800).

26563501320 is an abundant number, since it is smaller than the sum of its proper divisors (56966636280).

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

26563501320 is a wasteful number, since it uses less digits than its factorization.

26563501320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43419 (or 43415 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The spelling of 26563501320 in words is "twenty-six billion, five hundred sixty-three million, five hundred one thousand, three hundred twenty".