26198727786 has 288 divisors, whose sum is σ = 74191718016. Its totient is φ = 6604416000.

The previous prime is 26198727757. The next prime is 26198727811. The reversal of 26198727786 is 68772789162.

26198727786 is a `hidden beast` number, since 2 + 619 + 8 + 7 + 2 + 7 + 7 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 50285206 + ... + 50285726.

It is an arithmetic number, because the mean of its divisors is an integer number (257610132).

Almost surely, 2^26198727786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26198727786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37095859008).

26198727786 is an abundant number, since it is smaller than the sum of its proper divisors (47992990230).

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

26198727786 is a wasteful number, since it uses less digits than its factorization.

26198727786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 688 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The spelling of 26198727786 in words is "twenty-six billion, one hundred ninety-eight million, seven hundred twenty-seven thousand, seven hundred eighty-six".