26202642409 has 2 divisors, whose sum is σ = 26202642410. Its totient is φ = 26202642408.

The previous prime is 26202642377. The next prime is 26202642443. The reversal of 26202642409 is 90424620262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15220650384 + 10981992025 = 123372^2 + 104795^2 .

It is a cyclic number.

It is not a de Polignac number, because 26202642409 - 2⁵ = 26202642377 is a prime.

It is not a weakly prime, because it can be changed into another prime (26202642509) 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 as a sum of consecutive naturals, namely, 13101321204 + 13101321205.

It is an arithmetic number, because the mean of its divisors is an integer number (13101321205).

Almost surely, 2^26202642409 is an apocalyptic number.

It is an amenable number.

26202642409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26202642409 is an equidigital number, since it uses as much as digits as its factorization.

26202642409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 26202642409 in words is "twenty-six billion, two hundred two million, six hundred forty-two thousand, four hundred nine".