26609932981 has 8 divisors (see below), whose sum is σ = 26670600000. Its totient is φ = 26549296320.

The previous prime is 26609932969. The next prime is 26609933027. The reversal of 26609932981 is 18923990662.

It is a happy number.

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 26609932981 - 2²¹ = 26607835829 is a prime.

It is a super-2 number, since 2×26609932981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26609932931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3288861 + ... + 3296941.

It is an arithmetic number, because the mean of its divisors is an integer number (3333825000).

Almost surely, 2^26609932981 is an apocalyptic number.

It is an amenable number.

26609932981 is a deficient number, since it is larger than the sum of its proper divisors (60667019).

26609932981 is an equidigital number, since it uses as much as digits as its factorization.

26609932981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15179.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 26609932981 in words is "twenty-six billion, six hundred nine million, nine hundred thirty-two thousand, nine hundred eighty-one".