216409118291 has 8 divisors (see below), whose sum is σ = 217203907968. Its totient is φ = 215614504000.

The previous prime is 216409118287. The next prime is 216409118309. The reversal of 216409118291 is 192811904612.

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

It is a cyclic number.

It is not a de Polignac number, because 216409118291 - 2² = 216409118287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216409118221) 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, 2754686 + ... + 2832156.

It is an arithmetic number, because the mean of its divisors is an integer number (27150488496).

Almost surely, 2^216409118291 is an apocalyptic number.

216409118291 is a deficient number, since it is larger than the sum of its proper divisors (794789677).

216409118291 is an equidigital number, since it uses as much as digits as its factorization.

216409118291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87693.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 216409118291 in words is "two hundred sixteen billion, four hundred nine million, one hundred eighteen thousand, two hundred ninety-one".