26464363909 has 4 divisors (see below), whose sum is σ = 26826889516. Its totient is φ = 26101838304.

The previous prime is 26464363907. The next prime is 26464363949. The reversal of 26464363909 is 90936346462.

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 22938617025 + 3525746884 = 151455^2 + 59378^2 .

It is a cyclic number.

It is not a de Polignac number, because 26464363909 - 2¹ = 26464363907 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 (26464363901) 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, 181262694 + ... + 181262839.

It is an arithmetic number, because the mean of its divisors is an integer number (6706722379).

Almost surely, 2^26464363909 is an apocalyptic number.

It is an amenable number.

26464363909 is a deficient number, since it is larger than the sum of its proper divisors (362525607).

26464363909 is an equidigital number, since it uses as much as digits as its factorization.

26464363909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362525606.

The product of its (nonzero) digits is 5038848, while the sum is 52.

The spelling of 26464363909 in words is "twenty-six billion, four hundred sixty-four million, three hundred sixty-three thousand, nine hundred nine".