16783378919 has 2 divisors, whose sum is σ = 16783378920. Its totient is φ = 16783378918.

The previous prime is 16783378903. The next prime is 16783378961. The reversal of 16783378919 is 91987338761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16783378919 - 2⁴ = 16783378903 is a prime.

It is a super-2 number, since 2×16783378919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16783378819) 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 as a sum of consecutive naturals, namely, 8391689459 + 8391689460.

It is an arithmetic number, because the mean of its divisors is an integer number (8391689460).

Almost surely, 2^16783378919 is an apocalyptic number.

16783378919 is a deficient number, since it is larger than the sum of its proper divisors (1).

16783378919 is an equidigital number, since it uses as much as digits as its factorization.

16783378919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 62.

The spelling of 16783378919 in words is "sixteen billion, seven hundred eighty-three million, three hundred seventy-eight thousand, nine hundred nineteen".