26680891837 has 8 divisors (see below), whose sum is σ = 27979019640. Its totient is φ = 25407970560.

The previous prime is 26680891829. The next prime is 26680891933. The reversal of 26680891837 is 73819808662.

It can be written as a sum of positive squares in 4 ways, for example, as 5548164196 + 21132727641 = 74486^2 + 145371^2 .

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 26680891837 - 2³ = 26680891829 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 (26680891807) 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, 6299464 + ... + 6303697.

It is an arithmetic number, because the mean of its divisors is an integer number (3497377455).

Almost surely, 2^26680891837 is an apocalyptic number.

It is an amenable number.

26680891837 is a deficient number, since it is larger than the sum of its proper divisors (1298127803).

26680891837 is a wasteful number, since it uses less digits than its factorization.

26680891837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12603263.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 26680891837 in words is "twenty-six billion, six hundred eighty million, eight hundred ninety-one thousand, eight hundred thirty-seven".