216813398127 has 8 divisors (see below), whose sum is σ = 296897626416. Its totient is φ = 140635717632.

The previous prime is 216813398099. The next prime is 216813398167. The reversal of 216813398127 is 721893318612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-216813398127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216813398127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216813398167) 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, 976636818 + ... + 976637039.

It is an arithmetic number, because the mean of its divisors is an integer number (37112203302).

Almost surely, 2^216813398127 is an apocalyptic number.

216813398127 is a deficient number, since it is larger than the sum of its proper divisors (80084228289).

216813398127 is a wasteful number, since it uses less digits than its factorization.

216813398127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953273897.

The product of its digits is 870912, while the sum is 51.

The spelling of 216813398127 in words is "two hundred sixteen billion, eight hundred thirteen million, three hundred ninety-eight thousand, one hundred twenty-seven".