216139216249 has 8 divisors (see below), whose sum is σ = 236116183680. Its totient is φ = 196216906800.

The previous prime is 216139216247. The next prime is 216139216259. The reversal of 216139216249 is 942612931612.

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 216139216249 - 2¹ = 216139216247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216139216199 and 216139216208.

It is not an unprimeable number, because it can be changed into a prime (216139216247) 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, 13656222 + ... + 13672039.

It is an arithmetic number, because the mean of its divisors is an integer number (29514522960).

Almost surely, 2^216139216249 is an apocalyptic number.

It is an amenable number.

216139216249 is a deficient number, since it is larger than the sum of its proper divisors (19976967431).

216139216249 is a wasteful number, since it uses less digits than its factorization.

216139216249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27328991.

The product of its digits is 279936, while the sum is 46.

The spelling of 216139216249 in words is "two hundred sixteen billion, one hundred thirty-nine million, two hundred sixteen thousand, two hundred forty-nine".