26199559680 has 320 divisors, whose sum is σ = 97768028160. Its totient is φ = 5860491264.

The previous prime is 26199559669. The next prime is 26199559703. The reversal of 26199559680 is 8695599162.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 2521536 + ... + 2531904.

It is an arithmetic number, because the mean of its divisors is an integer number (305525088).

Almost surely, 2^26199559680 is an apocalyptic number.

26199559680 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 26199559680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48884014080).

26199559680 is an abundant number, since it is smaller than the sum of its proper divisors (71568468480).

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

26199559680 is a wasteful number, since it uses less digits than its factorization.

26199559680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449 (or 10433 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 26199559680 in words is "twenty-six billion, one hundred ninety-nine million, five hundred fifty-nine thousand, six hundred eighty".