26005812641 has 2 divisors, whose sum is σ = 26005812642. Its totient is φ = 26005812640.

The previous prime is 26005812607. The next prime is 26005812647. The reversal of 26005812641 is 14621850062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22704161041 + 3301651600 = 150679^2 + 57460^2 .

It is a cyclic number.

It is not a de Polignac number, because 26005812641 - 2¹⁸ = 26005550497 is a prime.

It is a super-2 number, since 2×26005812641² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26005812647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13002906320 + 13002906321.

It is an arithmetic number, because the mean of its divisors is an integer number (13002906321).

Almost surely, 2^26005812641 is an apocalyptic number.

It is an amenable number.

26005812641 is a deficient number, since it is larger than the sum of its proper divisors (1).

26005812641 is an equidigital number, since it uses as much as digits as its factorization.

26005812641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 26005812641 in words is "twenty-six billion, five million, eight hundred twelve thousand, six hundred forty-one".