26512870369 has 2 divisors, whose sum is σ = 26512870370. Its totient is φ = 26512870368.

The previous prime is 26512870289. The next prime is 26512870379. The reversal of 26512870369 is 96307821562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13938163600 + 12574706769 = 118060^2 + 112137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26512870369 is a prime.

It is a super-2 number, since 2×26512870369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26512870379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13256435184 + 13256435185.

It is an arithmetic number, because the mean of its divisors is an integer number (13256435185).

Almost surely, 2^26512870369 is an apocalyptic number.

It is an amenable number.

26512870369 is a deficient number, since it is larger than the sum of its proper divisors (1).

26512870369 is an equidigital number, since it uses as much as digits as its factorization.

26512870369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 26512870369 in words is "twenty-six billion, five hundred twelve million, eight hundred seventy thousand, three hundred sixty-nine".