26911169161890 has 256 divisors, whose sum is σ = 76699284480000. Its totient is φ = 5982536641536.

The previous prime is 26911169161859. The next prime is 26911169161901. The reversal of 26911169161890 is 9816196111962.

It is a super-2 number, since 2×26911169161890² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16183701 + ... + 17768919.

It is an arithmetic number, because the mean of its divisors is an integer number (299606580000).

Almost surely, 2^{26911169161890} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26911169161890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38349642240000).

26911169161890 is an abundant number, since it is smaller than the sum of its proper divisors (49788115318110).

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

26911169161890 is a wasteful number, since it uses less digits than its factorization.

26911169161890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585369.

The product of its (nonzero) digits is 2519424, while the sum is 60.

The spelling of 26911169161890 in words is "twenty-six trillion, nine hundred eleven billion, one hundred sixty-nine million, one hundred sixty-one thousand, eight hundred ninety".