26531970171121 has 4 divisors (see below), whose sum is σ = 28092674298852. Its totient is φ = 24971266043392.

The previous prime is 26531970171107. The next prime is 26531970171169. The reversal of 26531970171121 is 12117107913562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13252038912225 + 13279931258896 = 3640335^2 + 3644164^2 .

It is a cyclic number.

It is not a de Polignac number, because 26531970171121 - 2³⁹ = 25982214357233 is a prime.

It is a super-2 number, since 2×26531970171121² (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 (26531970171101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780352063840 + ... + 780352063873.

It is an arithmetic number, because the mean of its divisors is an integer number (7023168574713).

Almost surely, 2^{26531970171121} is an apocalyptic number.

It is an amenable number.

26531970171121 is a deficient number, since it is larger than the sum of its proper divisors (1560704127731).

26531970171121 is a wasteful number, since it uses less digits than its factorization.

26531970171121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560704127730.

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 26531970171121 in words is "twenty-six trillion, five hundred thirty-one billion, nine hundred seventy million, one hundred seventy-one thousand, one hundred twenty-one".