26491578873672 has 128 divisors (see below), whose sum is σ = 73982885760000. Its totient is φ = 7836704029440.

The previous prime is 26491578873653. The next prime is 26491578873701. The reversal of 26491578873672 is 27637887519462.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 26491578873594 and 26491578873603.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1972722 + ... + 7541537.

It is an arithmetic number, because the mean of its divisors is an integer number (577991295000).

Almost surely, 2^{26491578873672} is an apocalyptic number.

26491578873672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

26491578873672 is an abundant number, since it is smaller than the sum of its proper divisors (47491306886328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26491578873672 is a wasteful number, since it uses less digits than its factorization.

26491578873672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514531 (or 9514527 counting only the distinct ones).

The product of its digits is 1706987520, while the sum is 75.

The spelling of 26491578873672 in words is "twenty-six trillion, four hundred ninety-one billion, five hundred seventy-eight million, eight hundred seventy-three thousand, six hundred seventy-two".