26728998499 has 8 divisors (see below), whose sum is σ = 30663578880. Its totient is φ = 22823456136.

The previous prime is 26728998481. The next prime is 26728998509. The reversal of 26728998499 is 99489982762.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26728998499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26728998479) 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, 7257529 + ... + 7261210.

It is an arithmetic number, because the mean of its divisors is an integer number (3832947360).

Almost surely, 2^26728998499 is an apocalyptic number.

26728998499 is a deficient number, since it is larger than the sum of its proper divisors (3934580381).

26728998499 is a wasteful number, since it uses less digits than its factorization.

26728998499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519009.

The product of its digits is 282175488, while the sum is 73.

The spelling of 26728998499 in words is "twenty-six billion, seven hundred twenty-eight million, nine hundred ninety-eight thousand, four hundred ninety-nine".