26117217280 has 352 divisors, whose sum is σ = 80667389952. Its totient is φ = 7874150400.

The previous prime is 26117217253. The next prime is 26117217299. The reversal of 26117217280 is 8271271162.

It is a tau number, because it is divible by the number of its divisors (352).

It is a congruent number.

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, 12220372 + ... + 12222508.

Almost surely, 2^26117217280 is an apocalyptic number.

26117217280 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 26117217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40333694976).

26117217280 is an abundant number, since it is smaller than the sum of its proper divisors (54550172672).

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

26117217280 is a wasteful number, since it uses less digits than its factorization.

26117217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 26117217280 in words is "twenty-six billion, one hundred seventeen million, two hundred seventeen thousand, two hundred eighty".