18217416671457 has 16 divisors (see below), whose sum is σ = 24887498668032. Its totient is φ = 11847822970320.

The previous prime is 18217416671423. The next prime is 18217416671473. The reversal of 18217416671457 is 75417661471281.

It is not a de Polignac number, because 18217416671457 - 2¹⁴ = 18217416655073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18217416671457.

It is not an unprimeable number, because it can be changed into a prime (18217416671057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210382669 + ... + 210469242.

It is an arithmetic number, because the mean of its divisors is an integer number (1555468666752).

Almost surely, 2^{18217416671457} is an apocalyptic number.

It is an amenable number.

18217416671457 is a deficient number, since it is larger than the sum of its proper divisors (6670081996575).

18217416671457 is a wasteful number, since it uses less digits than its factorization.

18217416671457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420852268.

The product of its digits is 15805440, while the sum is 60.

The spelling of 18217416671457 in words is "eighteen trillion, two hundred seventeen billion, four hundred sixteen million, six hundred seventy-one thousand, four hundred fifty-seven".