26507480609 has 2 divisors, whose sum is σ = 26507480610. Its totient is φ = 26507480608.

The previous prime is 26507480569. The next prime is 26507480617. The reversal of 26507480609 is 90608470562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22058190400 + 4449290209 = 148520^2 + 66703^2 .

It is a cyclic number.

It is not a de Polignac number, because 26507480609 - 2¹⁶ = 26507415073 is a prime.

It is a super-2 number, since 2×26507480609² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26507482609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13253740304 + 13253740305.

It is an arithmetic number, because the mean of its divisors is an integer number (13253740305).

Almost surely, 2^26507480609 is an apocalyptic number.

It is an amenable number.

26507480609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26507480609 is an equidigital number, since it uses as much as digits as its factorization.

26507480609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 26507480609 in words is "twenty-six billion, five hundred seven million, four hundred eighty thousand, six hundred nine".