26591671689 has 16 divisors (see below), whose sum is σ = 38910412800. Its totient is φ = 16019657360.

The previous prime is 26591671679. The next prime is 26591671693. The reversal of 26591671689 is 98617619562.

It is a cyclic number.

It is not a de Polignac number, because 26591671689 - 2⁹ = 26591671177 is a prime.

It is a super-2 number, since 2×26591671689² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26591671619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2407089 + ... + 2418110.

It is an arithmetic number, because the mean of its divisors is an integer number (2431900800).

Almost surely, 2^26591671689 is an apocalyptic number.

It is an amenable number.

26591671689 is a deficient number, since it is larger than the sum of its proper divisors (12318741111).

26591671689 is a wasteful number, since it uses less digits than its factorization.

26591671689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825380.

The product of its digits is 9797760, while the sum is 60.

The spelling of 26591671689 in words is "twenty-six billion, five hundred ninety-one million, six hundred seventy-one thousand, six hundred eighty-nine".