26293999680 has 1008 divisors, whose sum is σ = 109271897280. Its totient is φ = 5965996032.

The previous prime is 26293999663. The next prime is 26293999703. The reversal of 26293999680 is 8699939262.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 710648622 + ... + 710648658.

It is an arithmetic number, because the mean of its divisors is an integer number (108404660).

Almost surely, 2^26293999680 is an apocalyptic number.

26293999680 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 26293999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54635948640).

26293999680 is an abundant number, since it is smaller than the sum of its proper divisors (82977897600).

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

26293999680 is a wasteful number, since it uses less digits than its factorization.

26293999680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The spelling of 26293999680 in words is "twenty-six billion, two hundred ninety-three million, nine hundred ninety-nine thousand, six hundred eighty".