26989559807 has 6 divisors (see below), whose sum is σ = 31396018608. Its totient is φ = 23133908364.

The previous prime is 26989559803. The next prime is 26989559837. The reversal of 26989559807 is 70895598962.

It is not a de Polignac number, because 26989559807 - 2² = 26989559803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26989559801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275403623 + ... + 275403720.

It is an arithmetic number, because the mean of its divisors is an integer number (5232669768).

Almost surely, 2^26989559807 is an apocalyptic number.

26989559807 is a deficient number, since it is larger than the sum of its proper divisors (4406458801).

26989559807 is an equidigital number, since it uses as much as digits as its factorization.

26989559807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550807357 (or 550807350 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 68.

The spelling of 26989559807 in words is "twenty-six billion, nine hundred eighty-nine million, five hundred fifty-nine thousand, eight hundred seven".