216391491106 has 8 divisors (see below), whose sum is σ = 370956841920. Its totient is φ = 92739210468.

The previous prime is 216391491101. The next prime is 216391491109. The reversal of 216391491106 is 601194193612.

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

It is not an unprimeable number, because it can be changed into a prime (216391491101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7728267526 + ... + 7728267553.

It is an arithmetic number, because the mean of its divisors is an integer number (46369605240).

Almost surely, 2^216391491106 is an apocalyptic number.

216391491106 is a deficient number, since it is larger than the sum of its proper divisors (154565350814).

216391491106 is a wasteful number, since it uses less digits than its factorization.

216391491106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456535088.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 216391491106 in words is "two hundred sixteen billion, three hundred ninety-one million, four hundred ninety-one thousand, one hundred six".