16778811323 has 4 divisors (see below), whose sum is σ = 16780809888. Its totient is φ = 16776812760.

The previous prime is 16778811311. The next prime is 16778811373. The reversal of 16778811323 is 32311887761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16778811323 - 2⁸ = 16778811067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16778811373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986636 + ... + 1003497.

It is an arithmetic number, because the mean of its divisors is an integer number (4195202472).

Almost surely, 2^16778811323 is an apocalyptic number.

16778811323 is a deficient number, since it is larger than the sum of its proper divisors (1998565).

16778811323 is an equidigital number, since it uses as much as digits as its factorization.

16778811323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998564.

The product of its digits is 338688, while the sum is 47.

The spelling of 16778811323 in words is "sixteen billion, seven hundred seventy-eight million, eight hundred eleven thousand, three hundred twenty-three".