26563538440 has 32 divisors (see below), whose sum is σ = 60238586880. Its totient is φ = 10541748672.

The previous prime is 26563538437. The next prime is 26563538459. The reversal of 26563538440 is 4483536562.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609442 + ... + 2619601.

It is an arithmetic number, because the mean of its divisors is an integer number (1882455840).

Almost surely, 2^26563538440 is an apocalyptic number.

26563538440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563538440 is an abundant number, since it is smaller than the sum of its proper divisors (33675048440).

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

26563538440 is a wasteful number, since it uses less digits than its factorization.

26563538440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5229181 (or 5229177 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 26563538440 in words is "twenty-six billion, five hundred sixty-three million, five hundred thirty-eight thousand, four hundred forty".