26919296981 has 8 divisors (see below), whose sum is σ = 27016570680. Its totient is φ = 26822158272.

The previous prime is 26919296977. The next prime is 26919297001. The reversal of 26919296981 is 18969291962.

It can be written as a sum of positive squares in 4 ways, for example, as 4097152081 + 22822144900 = 64009^2 + 151070^2 .

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 26919296981 - 2² = 26919296977 is a prime.

It is a super-2 number, since 2×26919296981² (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 (26919295981) 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, 374675 + ... + 440703.

It is an arithmetic number, because the mean of its divisors is an integer number (3377071335).

Almost surely, 2^26919296981 is an apocalyptic number.

It is an amenable number.

26919296981 is a deficient number, since it is larger than the sum of its proper divisors (97273699).

26919296981 is a wasteful number, since it uses less digits than its factorization.

26919296981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67495.

The product of its digits is 7558272, while the sum is 62.

The spelling of 26919296981 in words is "twenty-six billion, nine hundred nineteen million, two hundred ninety-six thousand, nine hundred eighty-one".