15964209842423 has 2 divisors, whose sum is σ = 15964209842424. Its totient is φ = 15964209842422.

The previous prime is 15964209842363. The next prime is 15964209842531. The reversal of 15964209842423 is 32424890246951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15964209842423 - 2¹² = 15964209838327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15964209842123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7982104921211 + 7982104921212.

It is an arithmetic number, because the mean of its divisors is an integer number (7982104921212).

Almost surely, 2^{15964209842423} is an apocalyptic number.

15964209842423 is a deficient number, since it is larger than the sum of its proper divisors (1).

15964209842423 is an equidigital number, since it uses as much as digits as its factorization.

15964209842423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 15964209842423 in words is "fifteen trillion, nine hundred sixty-four billion, two hundred nine million, eight hundred forty-two thousand, four hundred twenty-three".