26501250869 has 2 divisors, whose sum is σ = 26501250870. Its totient is φ = 26501250868.

The previous prime is 26501250827. The next prime is 26501250889. The reversal of 26501250869 is 96805210562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17203470244 + 9297780625 = 131162^2 + 96425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26501250869 is a prime.

It is a super-2 number, since 2×26501250869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26501250889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13250625434 + 13250625435.

It is an arithmetic number, because the mean of its divisors is an integer number (13250625435).

Almost surely, 2^26501250869 is an apocalyptic number.

It is an amenable number.

26501250869 is a deficient number, since it is larger than the sum of its proper divisors (1).

26501250869 is an equidigital number, since it uses as much as digits as its factorization.

26501250869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 26501250869 in words is "twenty-six billion, five hundred one million, two hundred fifty thousand, eight hundred sixty-nine".