26911169161891 has 16 divisors (see below), whose sum is σ = 30780696342528. Its totient is φ = 23047912641600.

The previous prime is 26911169161859. The next prime is 26911169161901. The reversal of 26911169161891 is 19816196111962.

It is not a de Polignac number, because 26911169161891 - 2⁵ = 26911169161859 is a prime.

It is a super-2 number, since 2×26911169161891² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26911169161801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179233536 + ... + 179383618.

It is an arithmetic number, because the mean of its divisors is an integer number (1923793521408).

Almost surely, 2^{26911169161891} is an apocalyptic number.

26911169161891 is a deficient number, since it is larger than the sum of its proper divisors (3869527180637).

26911169161891 is a wasteful number, since it uses less digits than its factorization.

26911169161891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170802.

The product of its digits is 2519424, while the sum is 61.

The spelling of 26911169161891 in words is "twenty-six trillion, nine hundred eleven billion, one hundred sixty-nine million, one hundred sixty-one thousand, eight hundred ninety-one".