26643320249968 has 20 divisors (see below), whose sum is σ = 52496372528280. Its totient is φ = 13095869274944.

The previous prime is 26643320249921. The next prime is 26643320249969. The reversal of 26643320249968 is 86994202334662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26643320249969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14111927155 + ... + 14111929042.

It is an arithmetic number, because the mean of its divisors is an integer number (2624818626414).

Almost surely, 2^{26643320249968} is an apocalyptic number.

It is an amenable number.

26643320249968 is a deficient number, since it is larger than the sum of its proper divisors (25853052278312).

26643320249968 is a wasteful number, since it uses less digits than its factorization.

26643320249968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28223856264 (or 28223856258 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 64.

The spelling of 26643320249968 in words is "twenty-six trillion, six hundred forty-three billion, three hundred twenty million, two hundred forty-nine thousand, nine hundred sixty-eight".