26311601 has 2 divisors, whose sum is σ = 26311602. Its totient is φ = 26311600.

The previous prime is 26311583. The next prime is 26311603. The reversal of 26311601 is 10611362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 9006001 = 4160^2 + 3001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26311601 is a prime.

Together with 26311603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26311603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13155800 + 13155801.

It is an arithmetic number, because the mean of its divisors is an integer number (13155801).

Almost surely, 2^26311601 is an apocalyptic number.

It is an amenable number.

26311601 is a deficient number, since it is larger than the sum of its proper divisors (1).

26311601 is an equidigital number, since it uses as much as digits as its factorization.

26311601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 26311601 is about 5129.4835022641. The cubic root of 26311601 is about 297.4283931890.

Adding to 26311601 its reverse (10611362), we get a palindrome (36922963).

The spelling of 26311601 in words is "twenty-six million, three hundred eleven thousand, six hundred one".