26487464391 has 24 divisors (see below), whose sum is σ = 38863808256. Its totient is φ = 17381051280.

The previous prime is 26487464293. The next prime is 26487464417. The reversal of 26487464391 is 19346478462.

It is not a de Polignac number, because 26487464391 - 2⁹ = 26487463879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26487464491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137016 + ... + 267858.

It is an arithmetic number, because the mean of its divisors is an integer number (1619325344).

Almost surely, 2^26487464391 is an apocalyptic number.

26487464391 is a deficient number, since it is larger than the sum of its proper divisors (12376343865).

26487464391 is a wasteful number, since it uses less digits than its factorization.

26487464391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131203 (or 131200 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 26487464391 in words is "twenty-six billion, four hundred eighty-seven million, four hundred sixty-four thousand, three hundred ninety-one".