26400329447 has 2 divisors, whose sum is σ = 26400329448. Its totient is φ = 26400329446.

The previous prime is 26400329411. The next prime is 26400329467. The reversal of 26400329447 is 74492300462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26400329447 - 2¹² = 26400325351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26400329467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200164723 + 13200164724.

It is an arithmetic number, because the mean of its divisors is an integer number (13200164724).

Almost surely, 2^26400329447 is an apocalyptic number.

26400329447 is a deficient number, since it is larger than the sum of its proper divisors (1).

26400329447 is an equidigital number, since it uses as much as digits as its factorization.

26400329447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 26400329447 in words is "twenty-six billion, four hundred million, three hundred twenty-nine thousand, four hundred forty-seven".