26397601789357 has 2 divisors, whose sum is σ = 26397601789358. Its totient is φ = 26397601789356.

The previous prime is 26397601789313. The next prime is 26397601789373. The reversal of 26397601789357 is 75398710679362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23886473489641 + 2511128299716 = 4887379^2 + 1584654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26397601789357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26397601789357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26397601789397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13198800894678 + 13198800894679.

It is an arithmetic number, because the mean of its divisors is an integer number (13198800894679).

Almost surely, 2^{26397601789357} is an apocalyptic number.

It is an amenable number.

26397601789357 is a deficient number, since it is larger than the sum of its proper divisors (1).

26397601789357 is an equidigital number, since it uses as much as digits as its factorization.

26397601789357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720135360, while the sum is 73.

The spelling of 26397601789357 in words is "twenty-six trillion, three hundred ninety-seven billion, six hundred one million, seven hundred eighty-nine thousand, three hundred fifty-seven".