26440663504 has 40 divisors (see below), whose sum is σ = 51540228992. Its totient is φ = 13140195840.

The previous prime is 26440663477. The next prime is 26440663507. The reversal of 26440663504 is 40536604462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26440663507) 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 7 ways as a sum of consecutive naturals, for example, 1870447 + ... + 1884529.

Almost surely, 2^26440663504 is an apocalyptic number.

It is an amenable number.

26440663504 is a deficient number, since it is larger than the sum of its proper divisors (25099565488).

26440663504 is a wasteful number, since it uses less digits than its factorization.

26440663504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14795 (or 14789 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 26440663504 in words is "twenty-six billion, four hundred forty million, six hundred sixty-three thousand, five hundred four".