26680565680540 has 24 divisors (see below), whose sum is σ = 56658729370320. Its totient is φ = 10552313616768.

The previous prime is 26680565680507. The next prime is 26680565680543. The reversal of 26680565680540 is 4508656508662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26680565680543) 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 7 ways as a sum of consecutive naturals, for example, 7494539142 + ... + 7494542701.

It is an arithmetic number, because the mean of its divisors is an integer number (2360780390430).

Almost surely, 2^{26680565680540} is an apocalyptic number.

26680565680540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26680565680540 is an abundant number, since it is smaller than the sum of its proper divisors (29978163689780).

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

26680565680540 is a wasteful number, since it uses less digits than its factorization.

26680565680540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14989081941 (or 14989081939 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 61.

The spelling of 26680565680540 in words is "twenty-six trillion, six hundred eighty billion, five hundred sixty-five million, six hundred eighty thousand, five hundred forty".