26615439265 has 4 divisors (see below), whose sum is σ = 31938527124. Its totient is φ = 21292351408.

The previous prime is 26615439233. The next prime is 26615439281. The reversal of 26615439265 is 56293451662.

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 21155411601 + 5460027664 = 145449^2 + 73892^2 .

It is a cyclic number.

It is not a de Polignac number, because 26615439265 - 2⁵ = 26615439233 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 2661543922 + ... + 2661543931.

It is an arithmetic number, because the mean of its divisors is an integer number (7984631781).

Almost surely, 2^26615439265 is an apocalyptic number.

It is an amenable number.

26615439265 is a deficient number, since it is larger than the sum of its proper divisors (5323087859).

26615439265 is an equidigital number, since it uses as much as digits as its factorization.

26615439265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5323087858.

The product of its digits is 2332800, while the sum is 49.

The spelling of 26615439265 in words is "twenty-six billion, six hundred fifteen million, four hundred thirty-nine thousand, two hundred sixty-five".