16780405572323 has 2 divisors, whose sum is σ = 16780405572324. Its totient is φ = 16780405572322.

The previous prime is 16780405572313. The next prime is 16780405572433. The reversal of 16780405572323 is 32327550408761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16780405572323 is a prime.

It is a super-2 number, since 2×16780405572323² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16780405572313) 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, 8390202786161 + 8390202786162.

It is an arithmetic number, because the mean of its divisors is an integer number (8390202786162).

Almost surely, 2^{16780405572323} is an apocalyptic number.

16780405572323 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780405572323 is an equidigital number, since it uses as much as digits as its factorization.

16780405572323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 16780405572323 in words is "sixteen trillion, seven hundred eighty billion, four hundred five million, five hundred seventy-two thousand, three hundred twenty-three".