16645678313213 has 8 divisors (see below), whose sum is σ = 16668460210176. Its totient is φ = 16622911998000.

The previous prime is 16645678313207. The next prime is 16645678313227. The reversal of 16645678313213 is 31231387654661.

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 16645678313213 - 2¹⁰ = 16645678312189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645678303213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756613 + ... + 6031338.

It is an arithmetic number, because the mean of its divisors is an integer number (2083557526272).

Almost surely, 2^{16645678313213} is an apocalyptic number.

It is an amenable number.

16645678313213 is a deficient number, since it is larger than the sum of its proper divisors (22781896963).

16645678313213 is a wasteful number, since it uses less digits than its factorization.

16645678313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7790875.

The product of its digits is 13063680, while the sum is 56.

The spelling of 16645678313213 in words is "sixteen trillion, six hundred forty-five billion, six hundred seventy-eight million, three hundred thirteen thousand, two hundred thirteen".