216867425389407 has 24 divisors (see below), whose sum is σ = 339418956194864. Its totient is φ = 132638123303424.

The previous prime is 216867425389343. The next prime is 216867425389441. The reversal of 216867425389407 is 704983524768612.

216867425389407 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 6 + 7 + 42 + 538 + 9 + 40 + 7 = 666.

It is not a de Polignac number, because 216867425389407 - 2⁶ = 216867425389343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216867425389457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5685771538 + ... + 5685809679.

It is a 1-persistent number, because it is pandigital, but 2⋅216867425389407 = 433734850778814 is not.

Almost surely, 2^{216867425389407} is an apocalyptic number.

216867425389407 is a deficient number, since it is larger than the sum of its proper divisors (122551530805457).

216867425389407 is a wasteful number, since it uses less digits than its factorization.

216867425389407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371581399 (or 11371581396 counting only the distinct ones).

The product of its (nonzero) digits is 975421440, while the sum is 72.

The spelling of 216867425389407 in words is "two hundred sixteen trillion, eight hundred sixty-seven billion, four hundred twenty-five million, three hundred eighty-nine thousand, four hundred seven".