26006137921 has 8 divisors (see below), whose sum is σ = 26084737800. Its totient is φ = 25927630848.

The previous prime is 26006137903. The next prime is 26006137951. The reversal of 26006137921 is 12973160062.

It can be written as a sum of positive squares in 4 ways, for example, as 13985427600 + 12020710321 = 118260^2 + 109639^2 .

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 26006137921 - 2¹¹ = 26006135873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26006137951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560025 + ... + 604681.

It is an arithmetic number, because the mean of its divisors is an integer number (3260592225).

Almost surely, 2^26006137921 is an apocalyptic number.

It is an amenable number.

26006137921 is a deficient number, since it is larger than the sum of its proper divisors (78599879).

26006137921 is a wasteful number, since it uses less digits than its factorization.

26006137921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46403.

The product of its (nonzero) digits is 27216, while the sum is 37.

Adding to 26006137921 its reverse (12973160062), we get a palindrome (38979297983).

The spelling of 26006137921 in words is "twenty-six billion, six million, one hundred thirty-seven thousand, nine hundred twenty-one".