26620402439 has 2 divisors, whose sum is σ = 26620402440. Its totient is φ = 26620402438.

The previous prime is 26620402433. The next prime is 26620402451. The reversal of 26620402439 is 93420402662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26620402439 - 2²⁸ = 26351966983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26620402433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13310201219 + 13310201220.

It is an arithmetic number, because the mean of its divisors is an integer number (13310201220).

Almost surely, 2^26620402439 is an apocalyptic number.

26620402439 is a deficient number, since it is larger than the sum of its proper divisors (1).

26620402439 is an equidigital number, since it uses as much as digits as its factorization.

26620402439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 26620402439 in words is "twenty-six billion, six hundred twenty million, four hundred two thousand, four hundred thirty-nine".