26928689621 has 8 divisors (see below), whose sum is σ = 27507786624. Its totient is φ = 26349848800.

The previous prime is 26928689611. The next prime is 26928689633. The reversal of 26928689621 is 12698682962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26928689621 - 2¹⁰ = 26928688597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26928689611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156521 + ... + 279921.

It is an arithmetic number, because the mean of its divisors is an integer number (3438473328).

Almost surely, 2^26928689621 is an apocalyptic number.

It is an amenable number.

26928689621 is a deficient number, since it is larger than the sum of its proper divisors (579097003).

26928689621 is a wasteful number, since it uses less digits than its factorization.

26928689621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128091.

The product of its digits is 8957952, while the sum is 59.

The spelling of 26928689621 in words is "twenty-six billion, nine hundred twenty-eight million, six hundred eighty-nine thousand, six hundred twenty-one".