26686844500 has 48 divisors (see below), whose sum is σ = 58440734352. Its totient is φ = 10646044800.

The previous prime is 26686844491. The next prime is 26686844519. The reversal of 26686844500 is 544868662.

It can be written as a sum of positive squares in 8 ways, for example, as 15185139984 + 11501704516 = 123228^2 + 107246^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114954 + ... + 258046.

It is an arithmetic number, because the mean of its divisors is an integer number (1217515299).

Almost surely, 2^26686844500 is an apocalyptic number.

26686844500 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 26686844500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29220367176).

26686844500 is an abundant number, since it is smaller than the sum of its proper divisors (31753889852).

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

26686844500 is a wasteful number, since it uses less digits than its factorization.

26686844500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143485 (or 143473 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 49.

The spelling of 26686844500 in words is "twenty-six billion, six hundred eighty-six million, eight hundred forty-four thousand, five hundred".