26404147213 has 4 divisors (see below), whose sum is σ = 26405659260. Its totient is φ = 26402635168.

The previous prime is 26404147207. The next prime is 26404147283. The reversal of 26404147213 is 31274140462.

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 13104983529 + 13299163684 = 114477^2 + 115322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26404147213 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 (26404147283) 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, 729520 + ... + 764857.

It is an arithmetic number, because the mean of its divisors is an integer number (6601414815).

Almost surely, 2^26404147213 is an apocalyptic number.

It is an amenable number.

26404147213 is a deficient number, since it is larger than the sum of its proper divisors (1512047).

26404147213 is a wasteful number, since it uses less digits than its factorization.

26404147213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512046.

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 26404147213 its reverse (31274140462), we get a palindrome (57678287675).

The spelling of 26404147213 in words is "twenty-six billion, four hundred four million, one hundred forty-seven thousand, two hundred thirteen".