16807663945 has 16 divisors (see below), whose sum is σ = 20235577680. Its totient is φ = 13401932544.

The previous prime is 16807663933. The next prime is 16807663949. The reversal of 16807663945 is 54936670861.

16807663945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 221057424 + 16586606521 = 14868^2 + 128789^2 .

It is a cyclic number.

It is not a de Polignac number, because 16807663945 - 2¹⁵ = 16807631177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16807663949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3548799 + ... + 3553531.

It is an arithmetic number, because the mean of its divisors is an integer number (1264723605).

Almost surely, 2^16807663945 is an apocalyptic number.

It is an amenable number.

16807663945 is a deficient number, since it is larger than the sum of its proper divisors (3427913735).

16807663945 is a wasteful number, since it uses less digits than its factorization.

16807663945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6924.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 16807663945 in words is "sixteen billion, eight hundred seven million, six hundred sixty-three thousand, nine hundred forty-five".