26640281413 has 4 divisors (see below), whose sum is σ = 26640934848. Its totient is φ = 26639627980.

The previous prime is 26640281411. The next prime is 26640281429. The reversal of 26640281413 is 31418204662.

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 26640281413 - 2¹ = 26640281411 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 (26640281411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261181 + ... + 348562.

It is an arithmetic number, because the mean of its divisors is an integer number (6660233712).

Almost surely, 2^26640281413 is an apocalyptic number.

It is an amenable number.

26640281413 is a deficient number, since it is larger than the sum of its proper divisors (653435).

26640281413 is an equidigital number, since it uses as much as digits as its factorization.

26640281413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653434.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 26640281413 in words is "twenty-six billion, six hundred forty million, two hundred eighty-one thousand, four hundred thirteen".