26720317693253 has 4 divisors (see below), whose sum is σ = 26720374203648. Its totient is φ = 26720261182860.

The previous prime is 26720317693229. The next prime is 26720317693313. The reversal of 26720317693253 is 35239671302762.

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 26720317693253 - 2²⁴ = 26720300916037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26720317693753) 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, 27539903 + ... + 28493628.

It is an arithmetic number, because the mean of its divisors is an integer number (6680093550912).

Almost surely, 2^{26720317693253} is an apocalyptic number.

It is an amenable number.

26720317693253 is a deficient number, since it is larger than the sum of its proper divisors (56510395).

26720317693253 is an equidigital number, since it uses as much as digits as its factorization.

26720317693253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56510394.

The product of its (nonzero) digits is 17146080, while the sum is 56.

The spelling of 26720317693253 in words is "twenty-six trillion, seven hundred twenty billion, three hundred seventeen million, six hundred ninety-three thousand, two hundred fifty-three".