26120421215 has 16 divisors (see below), whose sum is σ = 35825364480. Its totient is φ = 17909609760.

The previous prime is 26120421199. The next prime is 26120421227. The reversal of 26120421215 is 51212402162.

It is not a de Polignac number, because 26120421215 - 2⁴ = 26120421199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512246 + ... + 560924.

It is an arithmetic number, because the mean of its divisors is an integer number (2239085280).

Almost surely, 2^26120421215 is an apocalyptic number.

26120421215 is a deficient number, since it is larger than the sum of its proper divisors (9704943265).

26120421215 is a wasteful number, since it uses less digits than its factorization.

26120421215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64022.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 26120421215 its reverse (51212402162), we get a palindrome (77332823377).

The spelling of 26120421215 in words is "twenty-six billion, one hundred twenty million, four hundred twenty-one thousand, two hundred fifteen".