26622194509 has 4 divisors (see below), whose sum is σ = 26921320380. Its totient is φ = 26323068640.

The previous prime is 26622194507. The next prime is 26622194513. The reversal of 26622194509 is 90549122662.

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 2662250409 + 23959944100 = 51597^2 + 154790^2 .

It is a cyclic number.

It is not a de Polignac number, because 26622194509 - 2¹ = 26622194507 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 (26622194507) 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, 149562802 + ... + 149562979.

It is an arithmetic number, because the mean of its divisors is an integer number (6730330095).

Almost surely, 2^26622194509 is an apocalyptic number.

It is an amenable number.

26622194509 is a deficient number, since it is larger than the sum of its proper divisors (299125871).

26622194509 is an equidigital number, since it uses as much as digits as its factorization.

26622194509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299125870.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 26622194509 in words is "twenty-six billion, six hundred twenty-two million, one hundred ninety-four thousand, five hundred nine".