16916917018013 has 4 divisors (see below), whose sum is σ = 17024668081980. Its totient is φ = 16809165954048.

The previous prime is 16916917018009. The next prime is 16916917018087. The reversal of 16916917018013 is 31081071961961.

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 4153924981924 + 12762992036089 = 2038118^2 + 3572533^2 .

It is a cyclic number.

It is not a de Polignac number, because 16916917018013 - 2² = 16916917018009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16916917038013) 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, 53875531748 + ... + 53875532061.

It is an arithmetic number, because the mean of its divisors is an integer number (4256167020495).

Almost surely, 2^{16916917018013} is an apocalyptic number.

It is an amenable number.

16916917018013 is a deficient number, since it is larger than the sum of its proper divisors (107751063967).

16916917018013 is a wasteful number, since it uses less digits than its factorization.

16916917018013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107751063966.

The product of its (nonzero) digits is 489888, while the sum is 53.

Adding to 16916917018013 its reverse (31081071961961), we get a palindrome (47997988979974).

The spelling of 16916917018013 in words is "sixteen trillion, nine hundred sixteen billion, nine hundred seventeen million, eighteen thousand, thirteen".