26397353463505 has 4 divisors (see below), whose sum is σ = 31676824156212. Its totient is φ = 21117882770800.

The previous prime is 26397353463487. The next prime is 26397353463527. The reversal of 26397353463505 is 50536435379362.

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 7714522915009 + 18682830548496 = 2777503^2 + 4322364^2 .

It is not a de Polignac number, because 26397353463505 - 2¹³ = 26397353455313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2639735346346 + ... + 2639735346355.

It is an arithmetic number, because the mean of its divisors is an integer number (7919206039053).

Almost surely, 2^{26397353463505} is an apocalyptic number.

It is an amenable number.

26397353463505 is a deficient number, since it is larger than the sum of its proper divisors (5279470692707).

26397353463505 is an equidigital number, since it uses as much as digits as its factorization.

26397353463505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279470692706.

The product of its (nonzero) digits is 183708000, while the sum is 61.

The spelling of 26397353463505 in words is "twenty-six trillion, three hundred ninety-seven billion, three hundred fifty-three million, four hundred sixty-three thousand, five hundred five".