16618378045 has 8 divisors (see below), whose sum is σ = 20147642424. Its totient is φ = 13157643264.

The previous prime is 16618378037. The next prime is 16618378093. The reversal of 16618378045 is 54087381661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 992628036 + 15625750009 = 31506^2 + 125003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16618378045 - 2³ = 16618378037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16618378045.

It is a congruent number.

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, 17131864 + ... + 17132833.

It is an arithmetic number, because the mean of its divisors is an integer number (2518455303).

Almost surely, 2^16618378045 is an apocalyptic number.

It is an amenable number.

16618378045 is a deficient number, since it is larger than the sum of its proper divisors (3529264379).

16618378045 is an equidigital number, since it uses as much as digits as its factorization.

16618378045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34264799.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 16618378045 in words is "sixteen billion, six hundred eighteen million, three hundred seventy-eight thousand, forty-five".