16780768846829 has 4 divisors (see below), whose sum is σ = 18071597219676. Its totient is φ = 15489940473984.

The previous prime is 16780768846781. The next prime is 16780768846841. The reversal of 16780768846829 is 92864886708761.

16780768846829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3856549716100 + 12924219130729 = 1963810^2 + 3595027^2 .

It is a cyclic number.

It is not a de Polignac number, because 16780768846829 - 2³² = 16776473879533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16780768846129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645414186404 + ... + 645414186429.

It is an arithmetic number, because the mean of its divisors is an integer number (4517899304919).

Almost surely, 2^{16780768846829} is an apocalyptic number.

It is an amenable number.

16780768846829 is a deficient number, since it is larger than the sum of its proper divisors (1290828372847).

16780768846829 is a wasteful number, since it uses less digits than its factorization.

16780768846829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290828372846.

The product of its (nonzero) digits is 3121348608, while the sum is 80.

The spelling of 16780768846829 in words is "sixteen trillion, seven hundred eighty billion, seven hundred sixty-eight million, eight hundred forty-six thousand, eight hundred twenty-nine".