26343430209 has 24 divisors (see below), whose sum is σ = 38785384872. Its totient is φ = 17223897600.

The previous prime is 26343430187. The next prime is 26343430219. The reversal of 26343430209 is 90203434362.

26343430209 is a `hidden beast` number, since 2 + 6 + 343 + 4 + 302 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1559855025 + 24783575184 = 39495^2 + 157428^2 .

It is not a de Polignac number, because 26343430209 - 2¹⁵ = 26343397441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26343430219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1326219 + ... + 1345935.

It is an arithmetic number, because the mean of its divisors is an integer number (1616057703).

Almost surely, 2^26343430209 is an apocalyptic number.

It is an amenable number.

26343430209 is a deficient number, since it is larger than the sum of its proper divisors (12441954663).

26343430209 is a wasteful number, since it uses less digits than its factorization.

26343430209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22577 (or 22574 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The spelling of 26343430209 in words is "twenty-six billion, three hundred forty-three million, four hundred thirty thousand, two hundred nine".