26965797721 has 8 divisors (see below), whose sum is σ = 27438593760. Its totient is φ = 26493526752.

The previous prime is 26965797689. The next prime is 26965797739. The reversal of 26965797721 is 12779756962.

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 26965797721 - 2⁵ = 26965797689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26965797721.

It is not an unprimeable number, because it can be changed into a prime (26965797791) 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, 26935 + ... + 233788.

It is an arithmetic number, because the mean of its divisors is an integer number (3429824220).

Almost surely, 2^26965797721 is an apocalyptic number.

It is an amenable number.

26965797721 is a deficient number, since it is larger than the sum of its proper divisors (472796039).

26965797721 is a wasteful number, since it uses less digits than its factorization.

26965797721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262535.

The product of its digits is 20003760, while the sum is 61.

The spelling of 26965797721 in words is "twenty-six billion, nine hundred sixty-five million, seven hundred ninety-seven thousand, seven hundred twenty-one".