16783978295968 has 48 divisors (see below), whose sum is σ = 35711899866216. Its totient is φ = 7718884024320.

The previous prime is 16783978295941. The next prime is 16783978295971. The reversal of 16783978295968 is 86959287938761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16109851909264 + 674126386704 = 4013708^2 + 821052^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71673321 + ... + 71907112.

Almost surely, 2^{16783978295968} is an apocalyptic number.

It is an amenable number.

16783978295968 is an abundant number, since it is smaller than the sum of its proper divisors (18927921570248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16783978295968 is a wasteful number, since it uses less digits than its factorization.

16783978295968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143580737 (or 143580729 counting only the distinct ones).

The product of its digits is 19752284160, while the sum is 88.

The spelling of 16783978295968 in words is "sixteen trillion, seven hundred eighty-three billion, nine hundred seventy-eight million, two hundred ninety-five thousand, nine hundred sixty-eight".