216678158257 has 8 divisors (see below), whose sum is σ = 236447819712. Its totient is φ = 196920438000.

The previous prime is 216678158227. The next prime is 216678158273. The reversal of 216678158257 is 752851876612.

216678158257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-216678158257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216678158227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947333 + ... + 3019954.

It is an arithmetic number, because the mean of its divisors is an integer number (29555977464).

Almost surely, 2^216678158257 is an apocalyptic number.

It is an amenable number.

216678158257 is a deficient number, since it is larger than the sum of its proper divisors (19769661455).

216678158257 is a wasteful number, since it uses less digits than its factorization.

216678158257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970599.

The product of its digits is 11289600, while the sum is 58.

The spelling of 216678158257 in words is "two hundred sixteen billion, six hundred seventy-eight million, one hundred fifty-eight thousand, two hundred fifty-seven".