26815210149 has 128 divisors (see below), whose sum is σ = 46645903360. Its totient is φ = 13324953600.

The previous prime is 26815210129. The next prime is 26815210229. The reversal of 26815210149 is 94101251862.

It is not a de Polignac number, because 26815210149 - 2⁷ = 26815210021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26815210129) 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 127 ways as a sum of consecutive naturals, for example, 65562657 + ... + 65563065.

It is an arithmetic number, because the mean of its divisors is an integer number (364421120).

Almost surely, 2^26815210149 is an apocalyptic number.

It is an amenable number.

26815210149 is a deficient number, since it is larger than the sum of its proper divisors (19830693211).

26815210149 is a wasteful number, since it uses less digits than its factorization.

26815210149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 26815210149 in words is "twenty-six billion, eight hundred fifteen million, two hundred ten thousand, one hundred forty-nine".