26355669156121 has 2 divisors, whose sum is σ = 26355669156122. Its totient is φ = 26355669156120.

The previous prime is 26355669156083. The next prime is 26355669156191. The reversal of 26355669156121 is 12165196655362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19641170330896 + 6714498825225 = 4431836^2 + 2591235^2 .

It is a cyclic number.

It is not a de Polignac number, because 26355669156121 - 2²¹ = 26355667058969 is a prime.

It is not a weakly prime, because it can be changed into another prime (26355669156191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13177834578060 + 13177834578061.

It is an arithmetic number, because the mean of its divisors is an integer number (13177834578061).

Almost surely, 2^{26355669156121} is an apocalyptic number.

It is an amenable number.

26355669156121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26355669156121 is an equidigital number, since it uses as much as digits as its factorization.

26355669156121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496000, while the sum is 58.

The spelling of 26355669156121 in words is "twenty-six trillion, three hundred fifty-five billion, six hundred sixty-nine million, one hundred fifty-six thousand, one hundred twenty-one".