26405697795047 has 4 divisors (see below), whose sum is σ = 26405735392080. Its totient is φ = 26405660198016.

The previous prime is 26405697795041. The next prime is 26405697795049. The reversal of 26405697795047 is 74059779650462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26405697795047 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 (26405697795041) 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, 17724563 + ... + 19156500.

It is an arithmetic number, because the mean of its divisors is an integer number (6601433848020).

Almost surely, 2^{26405697795047} is an apocalyptic number.

26405697795047 is a deficient number, since it is larger than the sum of its proper divisors (37597033).

26405697795047 is an equidigital number, since it uses as much as digits as its factorization.

26405697795047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37597032.

The product of its (nonzero) digits is 800150400, while the sum is 71.

The spelling of 26405697795047 in words is "twenty-six trillion, four hundred five billion, six hundred ninety-seven million, seven hundred ninety-five thousand, forty-seven".