26398656889 has 8 divisors (see below), whose sum is σ = 28800277632. Its totient is φ = 23997326640.

The previous prime is 26398656883. The next prime is 26398656953. The reversal of 26398656889 is 98865689362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26398656889 - 2¹⁷ = 26398525817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26398656883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146032 + ... + 272254.

It is an arithmetic number, because the mean of its divisors is an integer number (3600034704).

Almost surely, 2^26398656889 is an apocalyptic number.

It is an amenable number.

26398656889 is a deficient number, since it is larger than the sum of its proper divisors (2401620743).

26398656889 is a wasteful number, since it uses less digits than its factorization.

26398656889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145247.

The product of its digits is 268738560, while the sum is 70.

The spelling of 26398656889 in words is "twenty-six billion, three hundred ninety-eight million, six hundred fifty-six thousand, eight hundred eighty-nine".