26921679801 has 4 divisors (see below), whose sum is σ = 35895573072. Its totient is φ = 17947786532.

The previous prime is 26921679797. The next prime is 26921679809. The reversal of 26921679801 is 10897612962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26921679801 - 2² = 26921679797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26921679809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4486946631 + ... + 4486946636.

It is an arithmetic number, because the mean of its divisors is an integer number (8973893268).

Almost surely, 2^26921679801 is an apocalyptic number.

It is an amenable number.

26921679801 is a deficient number, since it is larger than the sum of its proper divisors (8973893271).

26921679801 is an equidigital number, since it uses as much as digits as its factorization.

26921679801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973893270.

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 26921679801 in words is "twenty-six billion, nine hundred twenty-one million, six hundred seventy-nine thousand, eight hundred one".