26693589769921 has 4 divisors (see below), whose sum is σ = 26696211682644. Its totient is φ = 26690967857200.

The previous prime is 26693589769901. The next prime is 26693589769943. The reversal of 26693589769921 is 12996798539662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10110899095696 + 16582690674225 = 3179764^2 + 4072185^2 .

It is a cyclic number.

It is not a de Polignac number, because 26693589769921 - 2²¹ = 26693587672769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26693589769901) 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, 1310941090 + ... + 1310961451.

It is an arithmetic number, because the mean of its divisors is an integer number (6674052920661).

Almost surely, 2^{26693589769921} is an apocalyptic number.

It is an amenable number.

26693589769921 is a deficient number, since it is larger than the sum of its proper divisors (2621912723).

26693589769921 is a wasteful number, since it uses less digits than its factorization.

26693589769921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621912722.

The product of its digits is 4761711360, while the sum is 82.

The spelling of 26693589769921 in words is "twenty-six trillion, six hundred ninety-three billion, five hundred eighty-nine million, seven hundred sixty-nine thousand, nine hundred twenty-one".