26052211621 has 2 divisors, whose sum is σ = 26052211622. Its totient is φ = 26052211620.

The previous prime is 26052211571. The next prime is 26052211699. The reversal of 26052211621 is 12611225062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19310159521 + 6742052100 = 138961^2 + 82110^2 .

It is a cyclic number.

It is not a de Polignac number, because 26052211621 - 2²¹ = 26050114469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26052211621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26052211721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13026105810 + 13026105811.

It is an arithmetic number, because the mean of its divisors is an integer number (13026105811).

Almost surely, 2^26052211621 is an apocalyptic number.

It is an amenable number.

26052211621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26052211621 is an equidigital number, since it uses as much as digits as its factorization.

26052211621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 26052211621 its reverse (12611225062), we get a palindrome (38663436683).

The spelling of 26052211621 in words is "twenty-six billion, fifty-two million, two hundred eleven thousand, six hundred twenty-one".