26681979345 has 32 divisors (see below), whose sum is σ = 48838263552. Its totient is φ = 12185386752.

The previous prime is 26681979271. The next prime is 26681979353. The reversal of 26681979345 is 54397918662.

It is not a de Polignac number, because 26681979345 - 2¹⁹ = 26681455057 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 19062 + ... + 231791.

It is an arithmetic number, because the mean of its divisors is an integer number (1526195736).

Almost surely, 2^26681979345 is an apocalyptic number.

It is an amenable number.

26681979345 is a deficient number, since it is larger than the sum of its proper divisors (22156284207).

26681979345 is a wasteful number, since it uses less digits than its factorization.

26681979345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251881.

The product of its digits is 19595520, while the sum is 60.

The spelling of 26681979345 in words is "twenty-six billion, six hundred eighty-one million, nine hundred seventy-nine thousand, three hundred forty-five".