216867425389454 has 16 divisors (see below), whose sum is σ = 372825909783648. Its totient is φ = 92679887173632.

The previous prime is 216867425389441. The next prime is 216867425389457. The reversal of 216867425389454 is 454983524768612.

It is a happy 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 (216867425389457) 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, 21941256227 + ... + 21941266110.

It is an arithmetic number, because the mean of its divisors is an integer number (23301619361478).

Almost surely, 2^{216867425389454} is an apocalyptic number.

216867425389454 is a deficient number, since it is larger than the sum of its proper divisors (155958484394194).

216867425389454 is a wasteful number, since it uses less digits than its factorization.

216867425389454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43882522699.

The product of its digits is 2786918400, while the sum is 74.

The spelling of 216867425389454 in words is "two hundred sixteen trillion, eight hundred sixty-seven billion, four hundred twenty-five million, three hundred eighty-nine thousand, four hundred fifty-four".