26172649907 has 2 divisors, whose sum is σ = 26172649908. Its totient is φ = 26172649906.

The previous prime is 26172649883. The next prime is 26172649933. The reversal of 26172649907 is 70994627162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26172649907 - 2¹⁰ = 26172648883 is a prime.

It is not a weakly prime, because it can be changed into another prime (26172649807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13086324953 + 13086324954.

It is an arithmetic number, because the mean of its divisors is an integer number (13086324954).

Almost surely, 2^26172649907 is an apocalyptic number.

26172649907 is a deficient number, since it is larger than the sum of its proper divisors (1).

26172649907 is an equidigital number, since it uses as much as digits as its factorization.

26172649907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 26172649907 in words is "twenty-six billion, one hundred seventy-two million, six hundred forty-nine thousand, nine hundred seven".